Martínez is tall, born on December 3, 1997 in Santo Domingo, Distrito Nacional. Her parents are Agripina Martínez, who also served as Dominican Republic youth and junior squads team manager, and Juan Doñe. Her siblings are Brayelin who also play for the Dominican Republic national volleyball teams and Brayan, who play professional basketball with Titanes del Distrito Nacional. She is the cousin of basketball player Jack Michael Martínez and niece of the former national team basketball player and politician Vice-Minister of Sports Soterio Ramírez she confessed that she never liked basketball, but felt in love with volleyball since childhood. She finds support in her sister Brayelin, who as the inspiration to play volleyball.
In March, Martinez joined the Dominican club Playeras from the Boca Chica municipality, joining her sister Brayelin and winning the local tournament after defeating the San Lorenzo de Los Mina club in the final series. They previously easyly defeated Villa Duarte in the semifinals. She later played the NORCECA Junior Championship helping her team to win the bronze medal and later joined the under 23 National Team that won the U23 Pan-American Cup and earning the Best Middle Blocker individual award tied with the Peruvian Andrea Urrutia. After the gold medal, she was among the athletes included in the Dominican Government program that support the new values by the Minister of Sports, Physical Education and Recreation.
2015
Martinez debuted with the Dominican Republic national senior team in Montreux, Switzerland during the Montreux Volley Masters having a team leading 14 points in the classification match for fifth place, including nine blocks. She then played the Junior Pan-American Cup in home soil, winning the gold medal and the qualification for the 2015 FIVB U23 World Championship and was awarded the second Best Middle Blocker of the tournament. Martinez was chosen to play with the Dominican club Mirador as a wildcard in the FIVB Club World Championship but the team fell 1-3 to Voléro Zürich and 0-3 to Rexona Ades Rio to end their participation in the fifth place. She then played the NORCECA Champions Cup, taking home the gold medal and the qualification for the 2015 FIVB World Cup She then played the 2015 Pan American Games in Toronto, Canada, winning the bronze medal. She took part in the FIVB U23 World Championship finishing with her team the first round undefeated before losing 2-3 to Brazil in the semifinals, she confessed that the team felt sorry about a match they would have won. She ended up winning the bronze medal after coming from behind 3-2 to Japan. Back with her senior team in the World Cup, and after posting a 5-6 record, they finished in the seventh place from twelve teams. In September, Martínez signed with the French club Rocheville Le Cannet, then traveled to Puerto Rico to take part in the 2015 U20 World Championship with her junior team who advanced to the semifinals without losing one game as they later won 3-2 over Italy in the semifinals. They then beat Brazil 3-2 to win the gold medal. After the game, Martínez credited the teamwork as the key element for they win. Martínez senior team lost 1-3 to the United States the NORCECA Championship, ending their participation with the silver medal. Later, she was enrolled in October by the Japan Anti-Doping Agency to be part of the Play True 2020 Torch Relay project, where she was among many athletes aimed to leave real heritage in sport for the world and the future.
