List of The Ultraman characters

Earth Self-Defense Army

Science Guard (SG)

Other members of Earth Self-Defense Army

Mechas and vehicles

• : A multipurpose aircraft designed by Tobe. It was originally made for the Far East branch of Earth Self-Defense Army before Captain Akiyama demanded the ship in exchange for leading the Science Guard. During long distance missions, it can act as a mobile base and has a room for scientific analysis. In episode 6, Tobe modify the Super Mardock with harpoon ammunition and an outer shell for underwater combat. It was destroyed in episode 37.
• *: A red fighter jet of Earth Self-Defense Army used for reconnaissance purposes. It has canard wings and laser guns on each side. Pig once rode a malfunctioning gray-colored Bardy before the others talked him out of his suicidal thoughts. In episode 47, units were introduced to fight against the invading Heller Fleet.
• *: An orange-colored prototype VTOL which usually stored on the left side of Super Mardock. It is equipped with a rotating cannon on its back. Episode 48 saw the development of the for outer space combat purposes.
• : A subterrene first used for investigating forest disappearances in episode 5. In episode 33, a second unit called the was built as its successor with twin drills and used in the underground exploration of Maroi Island.
• : Six-wheeled patrol cars with butterfly doors.
• : An aircraft used by Tobe and Marume to explore the monster containment planet Prison in episode 34, but was destroyed by a rampaging monster.
• : A 300 meter long space combat ship which was created by the People of U40 and buried underneath Antarctica for safekeeping. In the height of Heller Army's invasion on U40, Amia escaped to Earth and reactivated the ship, giving it to the Science Guard in countering Heller's attack on Earth, as well as replacing the destroyed Super Mardock. Being made by the Ultras, the ship is powered by a nuclear fusion energy that is not of Earth properties and can sustain itself for at least 100 years. In episode 44, the Ultria was shown capable of splitting into two different components, Alpha and Beta respectively.

  Ultra People

Antagonists

Badel Tribe

• : By using the Ultra Mind stolen from the depths of a black hole, they created the Spirit Parasite, a malevolent spiritual entity that would assimilate with any reptile turning them into monsters. On Earth, the Spirit have been known to use the bodies of Guerad, Janur and Bedoran before finally destroyed in Janur III. Assimilated monsters have the prefix on their name:
• *: Born from the Spirit Parasite possessing a monitor lizard, it rampaged across three major cities in African continent and fought Joneus to the point of exhaustion before exploding from the latter's Planium Ray. This form is known for the ability to exhale flames.
• *: Once Guerad had been destroyed, the spirit parasite would assimilate with a king cobra, fighting the severely weakened Joneus with its electricity-induced constriction before the Ultra retreated.
• *: A stegosaurus monster that served as the parasite's new body, rampaging in North America. With its 900,000° fire breath and horns, it managed to beat the weakened Joneus to death.
• *: A three headed variant of Janur which the Science Guard fought against. When the Ultra Mind was sealed by seven chosen warriors, Janur III and the Spirit Parasite lost their strength as they were destroyed by Super Mardock and Bardy units.
• : A gigantic monster that Badel sent to attack U40, whose capable of exhaling white flames for offensive means. It originated from the deepest part of the space and was originally uncontrollable until the Badels get their hands on the Ultra Mind. While the rest of the chosen Ultra People sealed the Ultra Mind, Joneus fought against Bagon on his home world and successfully destroy it with Rocking Spark while being thrown into the frictional heat during its atmospheric fall into U40.
• : A nautilus space monster that is remnant of Badel's fighting forces, it went to Earth after tailing Amia's energy sphere. Because Joneus used up most of his energies to heal Kyōko, he was partially drained in the battle and almost defeated until Amia transformed and destroy it when both siblings combine their energy beam.

  Heller Empire/Heller Army

• : A monster from dark nebula that was sent to uncover the battleship Ultria on Earth. Joneus fought against it as Gumons was killed by the firepower of Ultria, boarded by Amia.
• : The first assassin sent by Royger to Earth, it is a space life form that drains its target of energy to grow in size. Hellcat targeted a space shuttle and killed its crew members as it returned to Earth one year ahead from its intended schedule. Posing as a harmless domestic cat, it slipped into the space station EGG3 and killed a patrolling guard on duty, forcing the Ultria to leave but Hellcat managed to enter it undetected. After attacking Pig and Mutsumi in her shower, Joneus appeared as he lured Hellcat to an empty room as Pig detonated the wall for both of them to be ejected to outer space. With the sunlight, a fully charged Joneus continued his battle and destroy Hellcat with Planium Ray with the help of Ultra's Anti Photon Beam.
• : A robotic knock-off of Ultraman Joneus which the Alien Giro first used in a staged fight against their own monster Giros on two occasions. After the Alien Giro succeeded in their plan, Imit-Joneus would join forces with Giros to attack the battleship Ultria. The real Joneus fought against him and caught in a beam struggle. When the Imit-Joneus loses, his body turned blue and exploded. Being a copy of Joneus, his grunts is on a lower pitch and shoots.
• : A monster that Alien Giros used as part of their invasion forces. It participated in a mock fight against Imit-Joneus twice before they were called to help the Heller Army in rampaging at an urban area. After defeating the Imit-Joneus, the Ultra switched his focus to Giros and defeated it with Planium Ray. Giros can unveil a set of blades on its torso which rotates to create a tornado to shield itself or tearing apart any objects in its path.
• : A fusion of both Dostony units, A and B when their particles fused through the electron transmitter in the Titan Base. Once deployed to Earth, Neo Dostony fought the army with its fire breath as Joneus appeared and threw the monster to its electron transmitter, destroying both machine and monster with Planium Ray.
• *: The first of Heller Army's Dostony unit to be sent to Earth through their electron transmitter, unfortunately, it fused with Monki into Monki-Dostony and had its consciousness suppressed. The fusion was kept imprisoned by Earth Self Defense Army until Dostony B captured it to be brought back to Titan Base. Upon return, Dostony 1 was separated from Monki and fused with its brother unit into Neo Dostony.
• *: The second Dostony to be created and sent to retrieve its brother unit that was fused with Monki. Once they returned to Titan Base, they were simultaneously fused into Neo Dostony.
• : The Siender's guardian, deployed to attack the Ultria Alpha. As the Beta half joined the fray, Joneus dragged Spader away from it the Ultria and destroy it with Planium Ray.
• : A herd of monsters which deployed by Alien Sien in containment pods. Nine of them were descended to attack Earth on various continents of the planet before worldwide forces of Earth Self Defense Army taken care of them. A second wave were destroyed by the firepower of Ultria Alpha in space, but one managed to slip into Earth, forcing the ship's Beta half to go after it. Joneus defeated the monster before the Ultria Beta resume its journey with warp drive.
• : A space monster deployed to attack an urban area. From its mouth, it can form the to whip its opponents with and can shroud itself with energy to counter beam attacks. With the Jinda Android's bomb removed from Pig, Joneus threw it into Golding's mouth as it exploded upon detonation.
• : A giant robot which moves about in a caterpillar thread with its weapon being three Vulcan Cannons on its hands and fires from its singular optic. A saucer from the Heller Army controlled it from the sky. While rampaging in an urban area, Joneus' presence forced it to retreat until the monster return at night to attack the Science Guard's base. Through the transmitter that Tobe made, Hikari fine tuned it for Mutsumi to tell him as Joneus of the Heller Saucer's location. This allows Joneus to destroy the Heller Army on board, causing Gedon to go haywire and destroyed from Joneus' Planium Ray.
• : A monster that guarded Titan Base and was deployed when Amia, Hikari and Marume invaded their base. With the ability to breath fire, Umaya weakened Joneus until Elek and Loto arrived, defeating the monster off-screen.
• : A horned space panther which helped in capturing Amia during her attempt to escape custody. Before Panther could execute Amia under Heller's orders, it was attacked by Joneus and killed in Heller City's destruction.
• : The last monster of the series, Mac Datar was a carnivorous monster from Dark Nebula and kept underneath the Heller City. It was released to eliminate the captured Science Guard members before Hikari transform into Joneus and joined with Elek and Loto to destroy it.

  Other monsters and aliens

• : The first monster to be awakened, it was originally frozen in the Antarctic iceberg which splits and flowed into the equator while remaining frozen until Seagla broke free from it. Three other Seaglas were awakened when the first one brought their iceberg to the Tokyo Bay as Joneus debuted during their attack. Two of them were tricked by Joneus to freeze each other as he killed the remaining duo with Planium Ray.
• : A gigantic sentient tornado of 480 meters and beyond, whose true form is a beating heart with five tentacles. It attacked several power stations to consume their energy and accidentally caught Mutsumi in one of its hunts. The ESDS lured Spiral to their headquarters as Marume went into the tornado and had Mutsumi activated a signal flare, allowing Joneus to save them after killing its heart with Astro Beam.
• : Coming from, Wanigodon faced against the attacks from army forces as Marume delivers a killing blow that took down the monster. Investigations conducted by the scientists revealed that Wanigodon's regenerative factor allowed it to create more clones of itself should any of its fragment survived. One of them was Pero as two other joined it to fight against Joneus at the seaside. Through Pero's sensitivity to the sea water, Joneus threw both monsters into the lake.
• *: A smaller division of Wanigodon which was taken care by Takashi. Within a single night, Pero grew into the size of a domestic pet as it became a fully grown Wanigodon by the next day. Pero was killed by Joneus' Planium Ray after being thrown into the sea.
• : A sentient red cloud from space that suddenly appeared above the Japan Alps. During Science Guard's attempt to neutralize it, the cloud reacted from the heavy rain into a giant monster whose screaming in pain. To prevent Red Smogy from endangering the dam, Joneus scattered the rain clouds with Planium Ray, allowing it to revert into a red cloud from the sunlight's radiation as he brought it away from Earth.
• : A green-colored undersea monster from Africa continent that ate forests before moving to Japan a year later to do the same. It was named by Dr. Henry Nishiki. When Thoughgilas was attacked by Science Guard, Thoughgilan resurfaced to defend its mate but both were decimated by Joneus' Planium Ray.
• : The brown-colored counterpart/mate of Thoughgilan whose also from Africa continent and set up a nest underground the Japan alps for its children Thoughgilao and Thoughgilaco. Thoughgilas made it to surface after their nest was invaded by the Passerger and killed alongside its male counterpart by Joneus' Planium Ray.
• : The children of Thoughgilan and Thoughgilas, Thoughgilao is the male with horns to differentiate its sister Thoughgilaco. When Joneus killed both parents, he shrunk the children to harmless size as Henry Nishiki brought them to his home in Africa.
• : A bat-like monster from beneath the volcanic area of Pacific Oceans, having its history recorded since the ancient times by literature. During its second attack on several ships, Firebadon retreated to the depths of the ocean due to its inability to sustain for five minutes without any source of magma. The Super Mardock was modified to attack Firebadon in a volcanic area of the ocean before Joneus took matters to his own, firing a beam of energy on the same area which Super Mardock shot its harpoon, reducing the monster to pieces. Firebadon is capable of flying at the speed of Mach 7 and exhales fire from its mouth.
• : A space monster which attacked a space station five years prior and absorbed its main computer, crash landed on the Earth and went slumber underground since then. In the present day, Combugon was awakened from the electric waves resulted by as Pigmon detected its presence but the latter deemed it as a malfunction in its system. During Combugon's rise, Pig used the old Bardy to open fire on the monster's back as Joneus rip apart said computer, reverting the monster to its original form to be brought away towards outer space.
• : An alien who attempted to dispose Joneus in order to continue his invasion project unopposed. In his human form, Baltan captured photos of Ultraman Joneus' fight with Mikonos as a phony attempt to deceive the television stations as if it contained the Ultraman's secret. By luring Hikari to a Western house, Baltan had the former in a trap until Science Guard members freed him. After freezing the rescuing party, Baltan grew to giant size and fought against Joneus until he was detonated from the Planium Ray. From its claws, Baltan can fire to freeze his opponents in suspended animation until his own death. He was voiced by Mikio Terashima and first appeared in episode 2 of Ultraman.
• : A space monster brought from to Earth by Alien Baltan's saucer. Its true purpose was to act as a bait for Hikari to transform into Joneus and had their fight recorded under Alien Baltan in human form. Once Mikonos' deed was done, it became the receiving end of Joneus' Planium Ray.
• : The endling of a monster species from 12 million years, who was respected by the ancient people of, situated next to the Easter Island in South Pacific. 6,000 years later, Dolfiego awakened when its resting place was intruded by a group of archaeologists and brainwashed three members into its personal slave. Due to being disturbed by human activities on the surface, it sent the brainwashed victims to destroy the excavation site, a ship and a power station. Hikari managed to negotiate with the monster, but his efforts went in vain when Science Guard detonated the temple to save the brainwashed victims, who were returned to normal. Dolfiego surfaced as it fought against Joneus and was killed with the Tamara Island sank into the ocean.
• : A quadrupedal monster from, it obtain the ability to pseudo-teleport its illusion after merging with Gearge Satake and materialized at the magician's own stage in Japan. The next day, Xalome went to Satake's household area and used the illusion again to lure the Science Guard somewhere else until Joneus shrank himself to put Xalome into suspended animation and used the Ultra Barrier Case to decompose it to cellular levels to save Mr. Satake before bringing the monster somewhere else.
• : Liquid-like life forms from the cave beneath the mountains of Himalaya which could hijack machines. When Ogawara try to attack them, they hijacked Hectore to attack the nearby village as a portion of them possessed Pig before Ogawara and Marume purged them out. After removing them from Hectore by heating the mecha itself, Joneus incinerate them with Planium Ray.
• *: Originally that was built by former Earth Self-Defense Army member Daisuke Ogawara after it was denied by said group due to the inactivity of monster attacks in the past. Ogawara built it in the Himalaya as an anti monster mecha but was possessed by the Liquid Monster into attacking the nearby village. It was destroyed by Super Mardock when it heated the giant bulldozer to purge the Liquid Monster out.
• : A trio of sibling monsters, and living under the same hermit shell from West Pacific. Originally peaceful sea creatures, they were mutated into monsters when human activities invaded their territory and caused them to be cut off from available food supplies. Cho and Jin became five-horned flame breathing and twin-horned solution spraying monsters while San relatively remain its original face due to its grief over the elder brothers. The two would attack various tanker ships to feed oil before marching their way to Tokyo Bay and sleep during the night. San managed to negotiate with Pig and the Science Guard to give the former a chance in convincing its brothers to left Earth but was knocked down when Cho and Jin contempt to continue marching towards metropolis. As Joneus was forced to kill the elder Opt brothers, San grew his horns and try to avenge them but died from his injuries. Its body was brought to the depths Antarctic ocean as San's final resting place.
• : An ancient monster who had once attack both forces of combatants nearby the after grieving for the losses of a pair of star-crossed lovers. Ever since then, the nearby villagers would perform an annual fete to quell Garadoras' anger. In the present day, Earth Self Defense Army mechanic Kinoshita asked Marume and Hikari's help in his village's fete when news of petrified fishes reached him. Unfortunately a group of researchers who operated at that lake were instantly petrified and so did Kinoshita, his grandmother and Marume when the helicopter's noise interrupted Garadoras. Joneus fought and destroy Garadoras with Planium Ray before returning its victims to normal. Befitting its subtitle, Garadoras can spew a petrifying sonic that turned its victims' flesh into stone.
• : A giraffe-like monster that resembled the Ultraman monster Dodongo and can exhale flames. Originally a benevolent monster, Geron was among the worldwide creatures influenced by the Asteroid Creature's presence that caused them to run amok. While rampaging in an oil refinery, Geron was killed by the firepower of Bardy and Super Mardock.
• : One of the monsters that went berserk from the Asteroid Creature's presence. Gadon emerged from a volcano and attacked the Super Mardock during its journey to outer space before Joneus threw the monster into an active volcano. Gadon's main ability is to fly at the speed of Mach 5.
• : A sentient celestial body that fly passed the Earth in its route, but its sole presence emits radioactive waves that can cause reptiles and monsters to become aggressive. When Earth Self-Defense Army try to destroy it with several missile, the living asteroid created Zyclon from surplus energy source as its guardian. After Zyclon's defeat, Asteroid Creature was killed by Joneus' Ultra Body Screw and Super Mardock's missiles.
• *: A monster created by the Asteroid Creature as its guardian to defend from incoming missile attacks. Aside from eye beams, it can also exhale 800 million lava and unleash 700 million volts of electricity discharges. Joneus fought the monster but the Asteroid Creature severely drain his energy, forcing him to recharge with the sunlight and grew 120 meters. Using this opportunity, Joneus used Ultra Body Screw to destroy Zyclon and penetrate across the core of Asteroid Creature.
• : Small space insects whose eggs were among the asteroid showers that hit the Space Station EGG3. A caterpillar-state Goglan was slipped into the space station and destroyed by Hikari when it try to eat the generator, which would have claimed the lives of all crew members. This act of heroism was observed by Joneus from afar, and since then chose Hikari as his host. In the present day, another Goglan egg made its way to Tsukuba Plant Research Institute. Mistaken as a plant seed, they radiate it with radioactive and it quickly grew to monstrous size even in its caterpillar state. After accidentally detonating an oil tank, Goglan transformed into a giant butterfly as Joneus killed it with Planium Ray.
• : A strange-looking bird with smaller wings on its chest, More was about the size of a chicken and flew alongside a flock of birds at the sea. It accidentally crashed a luxury cruise and was taken care by a vet per Mutsumi's wish. Based on the Science Guard's investigations, More is theorized to be a shrunken breed of the already extinct North Island giant moa.
• *: As a result of a veterinarian treating More with defibrillation, it grew to the size exceeding giant moa and flew from the cruise ship. King More would attack an oil tanker and chase the Super Mardock to catch Mutsumi, having infatuated to her. After a brief fight, Joneus shrunk King More to its original size as it went back to find a new home.
• : A giant grasshopper from African desert area. It flew with a swarm of grasshoppers, creating a typhoon that struck Japan and later on Egypt. During that moment, Badan attacked Tobe's Beatamy and later on try to eat Super Mardock until Joneus came to their aid. The ship itself blow freezing wind to save Joneus from the grasshoppers and him killing Badan with Planium Ray.
• : A monster whose true form is part of the, Yuriko's hometown. Due to the mining activity, Islanda was provoked and attacked its inhabitants. Super Mardock fired a narcotic that caused Islanda to halt its attacks. With part of the South Uki Island removed, Islanda try to escape but was killed by Joneus' Planium Ray Cross Shoot.
• : A young bipedal monster from another dimension who accidentally arrived on Earth. Zarmus' body possesses natural magnetic properties, causing him to use a barrier to contain it but said power leaked whenever he try to take a glimpse outside his barrier, causing ships to be accidentally absorbed into his barrier. After getting sucked into Zarmus' barrier, Marume get to meet the monster in person and helped building the extra-dimensional compass to send the former back home. Unfortunately as the rest of the Science Guard felt suspicious of Marume's secretive behavior, they attacked the barrier with missiles and caused it to broke. Now exposed to the real world, Zarmus rampaged in the coastal area before Joneus interfered, using the compass Marume created to send it back to its home dimension. He is voiced by Kenichi Ogata.
• : An aerial monster from Andes that was the last of its five brethren left. Flying at the speed of Mach 6 to 8, it attacked multiple locations with light-reflecting surfaces. The monster targeted a refinery but an attempt by pilot Aoki and Hikari to intercept the beast went in failure as their jet are incapable of sustaining greater speed. Sometime later, their jet managed to intercept Zamba with a modified missile, as Joneus took over the battle by first drilling it with Ultra Body Screw and ended it with two shots of Planium Ray.
• : A rebellious princess who was tired of her job of visiting planets. Her race is a liquefied alien being who would take the appearance of the native of a planet they visited as their physical forms. During a visit to Planet 427, her ship was attacked by assassins from the fifth Planet. As their ship approaching the Solar System, she took an escape saucer and assumed the form of Mutsumi during her patrol. The princess would soon found herself followed by her loyal servant and the very same assassins that came after her. After being rescued by Joneus, the princess and her servant thanked the Science Guard as they left Earth. Due to copying Mutsumi's form, she is also voiced by Sumi Shimamoto.
• *Servant: The unnamed servant of said princess also arrived on Earth and took the form of a mountain climber. After a brief misunderstanding, the servant explained everything to the Science Guard but realized that the real princess escaped with Hikari. He wielded a gun that spray sleeping gas. He was voiced by Masanobu Okubo.
• : Unseen criminals from the fifth planet who try to assassinate the princess using Doragodos. The assassin themselves were killed in the ensuing destruction of their mechanical dragon.
• : A spaceship that served as the fifth planet assassin's transportation. Its true form is a mechanical dragon which it transformed into once abducting the princess. With Joneus constricted, the Super Mardock saved him as the mechanical dragon exploded with its pilots by Joneus' Planium Rays. As its space dragon form, Doragodos can exhale 1.2 million° flames and has a rotating buzzsaw at the end of its tail. It was designed by Minoru Kujirai under the impression of Space Dragon Nurse from Ultra Seven.
• : A green dinosaur monster with the legendary flower on the abdomen. Hiding in an ancient underground ruins, it secrete hallucinogenic pollen to several city and lured its inhabitants to be eaten. Death Balan was exposed when the Science Guard intruded its hideout and was defeated by Joneus' Planium Ray.
• : A malevolent parasite from the Earth's cavity that caused worldwide catastrophes by posing as the Earth's own will, all while using its vines to drain the planet for its nutrients. However, once its ruse was exposed, it went towards the surface and was killed by Joneus' Planium Ray. He is voiced by Shōzō Iizuka.
• : A team of green dwarf aliens that operated in the and destroy multiple planets. While on its way to U40, the 7 Ultras' assault forced them to invade Earth instead and revive monsters as their advance guards. With their entire plan foiled by Science Guard, they escaped in a saucer to outer space but was intercepted by Joneus and seven other Ultras as they concentrate their beam on the ship, killing all known Baladon. They are voiced by Shōzō Iizuka and Shigeru Chiba.
• Monster Island residents : Since Alien Baladon had robbed and revived the deceased monsters from the Monster Graveyard, they were notable for being enemies of past Ultramen from previous live action Ultra Series. Despite this, neither of them participated in Baladon's invasion campaign and fought among themselves.
• *: The last monster to be released, who killed Ghostron and chased both Hikari and Marume when the two activated a bomb to destroy the Baladon asteroid's base. Joneus killed Red King by throwing it to the sky and sliced it with Boomerang Guillotine. Although first appeared in episode 8 of Ultraman, this Red King demonstrated the ability to exhale.
• * and : A pair monsters from episodes 19 of Ultraman. Although fighting each other due to being natural enemies, they teamed up with Red King and Gokinezula in against Joneus before being destroyed by his Planium Ray.
• *: A monster from episode 1 of The Return of Ultraman, killed by Marume's bazooka.
• *: From episode 8 of The Return of Ultraman, it fought against two other monsters from its home season and was killed by Red King. In addition to its original, this Ghostron can also unleash electrical discharge from its body.
• *: From episode 22 of The Return of Ultraman, it fought against other monsters of its home season but was killed in an attempt to fight Joneus while teaming up with Red King, Aboras and Banila. Different from its original counterpart, this Gokinezula has a morning star-like feature at the end of its tail.
• : A pair of space monsters, Fundus and Quillas, crash-landed on Earth and combined into Dabaran. It managed to take down the Super Mardock and try to attack the vulnerable ship but Gondō managed to instruct the Science Guard members to get it work again. Joneus defeated it with Planium Ray as Dabaran exploded in the mid air.
• *: A three-legged mammoth monster that first appeared at the industrial site as the Science Guard froze it, however the monster was brought to a nearby forest than their base due to the new captain Gondō assumed it to be still alive. The next day, his intuition proves right as Fundus struggled to escape. When Quillas appeared, Tobe thawed Fundus from its ice prison in hopes for both monsters to fight each other but they combined into Dabaran.
• *: A flying monster that approached the melting Fundus as they combined into Dabaran.
• : An army of invaders that targeted Earth and try to attack Ultraman Joneus, first by crippling the Far East Zone military base through their agents. Once the pair became Jagon and fought Joneus on Osaka, the commanded by launch their attack on Tokyo city and tricked Joneus into exhausting himself over to defend both faraway cities at once. The arrival of Elek and Loto managed to even the odds as Jadan forces try to escape Earth but was intercepted by all three Ultramen. Boa is voiced by Shōzō Iizuka as the navigation operative in the Combat Saucer Kill is voiced by Ikuo Nishikawa.
• *: A pair of Jadan agents Alpha and Beta escaped the Far East Zone base after sabotaging the main computer and combined into the twin headed monster Jagon. They proceed to lure Joneus into Osaka as their main leader attacked Tokyo to exhaust the Ultraman over saving both places until Elek and Loto joined the fray, forcing both Jadan and Jagon to escape. They are voiced by Yumiko Sato and Shigeharu Matsuda.
• : Originally the 600 million year old skeleton of an unknown species, having existed long before the dinosaur era. Its bones were assembled in a nearby museum but Skelldon gains sentience and rampaged across the city with its toxic breath, as well as reformatting itself upon receiving damages. It would retreat that night and hide into a nearby sewer as the Science Guard were investigating its actual origin. The day after that, Skelldon reappeared but the Science Guard managed to counter its use of poison gas. This time, the monster gained an additional ability to use its rib cage as makeshift boomerangs. Joneus appeared and froze the monster to detect its main weak point and strike it with two shots of Planium Ray before exhausting most of his energy supply.
• : A race of nocturnal aliens who attempted to invade the Earth with their robot Megazaura. After losing the thirteenth piece to professor Nishiki, they tracked it to the Science Guard's base and reclaim it. Any notable Babilar were killed as they piloted the Megazaura through its activation period. They are voiced by Shigeru Chiba and Hiroshi Ōtake.
• : The Babilar's invasion weapon, which scattered into several pieces upon atmospheric entry on Earth. They managed to obtain all pieces, save for the which was in professor Nishiki's possession while in his way to the Earth Self Defense Force's Far East headquarters. This part was later reclaimed as Megazaura was activated and proceed to make its way towards the city. Guided by Nishiki's discovery, Science Guard and Joneus were able to target its weak point as it blown into pieces from two shots of Planium Rays.
• : Slug-like creatures from underneath the Maroi Island, feeding on rocks which caused earthquake on the surface. When the Science Guard boarded the Passerger 2 to investigate, they encountered these creatures and open fire, causing all Gamiba to combine into a single monster. Joneus fought and burned its left hand at the magma, as both escaped and Gamiba detonated as a result of swallowing the Ultra's Planium Ray.
• : A team of aliens from dark nebula that had invaded the Monster Containment Planet Prison and caused it to go on a move towards Earth in 10 hours to invade it with the monster prisoners were used as their invasion forces. All of their forces were killed by Joneus, Elek and Loto.
• Monster prisoners: The prisoners of The held by U40 until the Imbedians released them as their army as invasion forces on Earth. Due to their invasion, the Prison had activated its self destruct mode that would detonate half of the Earth until Elek and Loto arrived as they fix the planet's navigation system, allowing the artificial planet to explode somewhere else safely. The inhabitants reach a total of more than 50 monsters and each had the prefix in their names:
• *, and : Background monster characters in the prison.
• * and : A pair of monsters who chased after Tobe, Marume and two other astronauts on Prison. Putogoria was killed by their cannon whereas Idodzunos was taken care by Joneus.
• *: A dark blue bat monster from of the Dark Nebula. It was the first of Prison inmates that escaped to Earth and defeated by Joneus, which caused the latter's energy to be exhausted.
• *: A purplish monster with the ability to fire electromagnetic waves. It destroyed Tobe and Marume's Station Hawk N3 and caused them to be stranded on Prison. Alongside Genario and Groteng, they were sent by the Invedians to attack Earth. Plazoon was sent back to Prison and were among the inhabitants to be killed in the resulting explosion.
• *: A green frilled monster that was first seen fighting Groteng on Prison's surface and destroyed by Marume with a leftover cannon from N3's wreckage. Another one were among the Invedian's invasion monsters on Earth to be killed by Elek and Loto.
• *: A purple-horned monster that was first seen fighting Agjon on Prison's surface. Alongside Plazoon and Groteng, they were sent by the Invedians to attack Earth and defeated by Elek and Loto.
• *: A brown monster that was deployed alongside Genario and Plazoon by the Invedians to attack Earth and defeated by Elek and Loto.
• :
• *: Noa's father, who was the head of the science development team. After their planet's sun begin to increase, the people of 82nd planet try to stabilize their hot environment. Yunk created the Freezer G radiation ray, but it resulted in the creation of Darantulas by accident. To counter the monster, he gave the to his daughter in his final breath. He was voiced by Ono Takeo.
• *: The daughter of late Dr. Yunku, she try to search for Ultraman Joneus on Earth, due to the Super Magma Capsule required his energy to be activated. As Draantulas chased her to Earth, she desperately try to search for any human but was mistaken for a Yuki-onna until she came across Hikari. With Darantulas defeated, Noa thanked Hikari and Joneus as she return to her home planet. She is voiced by Mari Okamoto.
• : Originally a normal spider residing the 82nd planet of Cygnus, it was radiated with the freezing ray which turned it into a giant monster with the ability to change the climate towards that of snowstorm through the breath. It chased Noa to Earth due to her possession of Super Magma Capsule and subjugate almost the entire Japan with a snowstorm. Joneus was almost frozen by Darantulas until the sun shines, allowing him to use the Super Magma Capsule onto himself and defeated the monster with his supercharged Planium Ray.
• : A young boy who lost his parents to the Heller Army and was tricked by Royger to command his monster Orolaan on attacking Earth under the pretense that his planet Opernicus would be destroyed. After being tended by Mutsumi, Fedelico was shocked to discover his Orolaan being modified into Heller Army's monster weapon. After sustaining a shot from the Heller Soldiers and barely returning to Earth in a weakened state, Fedelico told Hikari of Orolaan's weak point in his dying breath. His funeral was made by the Science Guard as they eject his body to the outer space. He is voiced by Yōko Kuri.
• : Fedelico's pet monster with the ability to elongate itself, exhaling and turn into a spherical saucer for transportation. It was kidnapped by the Heller Army after fleeing from Joneus from attacking the city.
• *: By placing a specialized machine that linked to its brain, Orolaan was reconfigured into a monster weapon for Heller Army's use and disobey Fedelico. From the alien boy's guidance, Joneus destroy Orolaan by targeting the monster's leg, causing the machine to be ejected and dissipate into light.
• : An old man from who made his reputation as a monster hunter in Andromeda Galaxy. Royger and the rest of the Heller Fleet deceive him into capturing Ultraman Joneus. Hatari rides an old space battleship which resembles a moving island on equator. Unaware to him, his "crew members" were in fact soldiers of Heller Fleet who obey his orders until they kill him should Joneus be captured. He saved Mutsumi after accidentally crashed a nearby ship, the latter try to warn him of Royger's trap. When Joneus was trapped by the ship, the Heller Fleet try to kill both Hatari and the former until Mutsumi saved them as they escaped with a smaller jet. After the army was killed by Joneus, Hatari bid farewell to the ESDS as he returned to space. He was voiced by Tarō Sagami II.

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