Cinnamon is really Katherine "Kate" Manser, the daughter of a sheriff in a small Western town. After her father is killed by bank robbers, she is sent to an orphanage where she secretly trains herself in gunfighting. Upon leaving the orphanage, she becomes a bounty hunter in order to search for her father's killers. As well as being a crack shot, Cinnamon uses her father's sheriff badge as a shuriken. In the third series of Hawkman, it is revealed that Cinnamon is a reincarnation of the Egyptian princess Chay-Ara. As such, she becomes the lover of Prince Khufu's reincarnation, the hero Nighthawk. When Cinnamon is attacked by the burglar "Gentleman Jim" Craddock, Nighthawk lynches him, wrongly believing he had sexually assaulted her and thereby tying his destiny to theirs. Cinnamon, along with Nighthawk, is killed by Matilda Dunney Roderic, presumably the latest incarnation of their eternal enemy Hath-Set. A billboard in Wonder Woman #175 advertises a musical entitled Cinnamon Get Your Gun, parodying Annie Get Your Gun. The Silver-Age Cinnamon appeared in Weird Western Tales #48-49, and Justice League of America #198-199.
Modern Cinnamon
A modern-day version of the character is introduced in the miniseries Cinnamon: El Ciclo, named by her parents after the historical gunslinger Cinnamon. Like the original, her father is a sheriff who is shot by bank robbers, leading her to seek revenge on the killers and become a bounty hunter. She is seen in the Infinite Crisis special Villains United being contacted by J'onn J'onzz the Martian Manhunter. She is one of many recruited to fight various supervillain prison escapes. One page later, she is seen lying on the ground, unconscious, with a cut on her forehead. Cinnamon does not appear again until Checkmate #24, where she is revealed as one of the organization's "Rooks."
New 52
Cinnamon appears in All-Star Western in both its backups and in the main Jonah Hex story. Kate's father, a sheriff, was killed by the Robinson gang and she was sent to an orphanage, which she promptly ran away from. She was found by Ichi, a wandering Samurai, who taught her for three years before mysteriously disappearing. Kate ended up teaming up with Nighthawk after that. Cinnamon wears an Indian Medallion which grants her enhanced strength and healing abilities.
In other media
Television
Cinnamon makes a cameo appearance in '. In the episode "The Siege of Starro" Pt. 1, she appears as part of a montage detailing superheroes throughout history, where she is shown helping Jonah Hex apprehend the Royal Flush Gang after the western group rob a bank.
Cinnamon is alluded in The Flash live-action series. In the episode "Power Outage", a movie poster can be seen featuring Nighthawk and Cinnamon.
Cinnamon appears in DC's Legends of Tomorrow, portrayed by Anna Deavere Smith. In the episode "The Magnificent Eight", the present Hawkgirl''' meets her previous incarnation in 1871 that deals with her sorrow over the death of Hannibal Hawkes.
