Fuego Negro, or the Black Flame, is secretly Juan Pedro Munoz, high school sophomore. Juan is the son of Fire Chief Hector Munoz and District Attorney Anna Munoz. Juan is the younger brother of up-and-coming super-model Maria Munoz, who is secretly the superhero Calliente. Prior to her acceptance into the Defenders of the Earth, Fuego Negro served as sidekick to Calliente. Juan and Maria were born in Denver, Colorado, and moved to Pacific City two years ago. Born and raised in the United States, Juan and Maria do not speak Spanish and chafe under the cultural expectations and stereotypes heaped upon them.

Juan and Maria gained their powers when they were young children. Their unscrupulous uncle, Victor Munoz, attempted to sacrifice the children while on vacation in Mexico, hoping to gain the favor and powers of Xiuhcoatl, the Aztec Fire Serpent, the personification of drought and destruction. Ometecuhtli, an Aztec god of fire, saved the children and bestowed upon them the powers of fire control with which to fight the evil Xiuhcoatl.

When not in school or fighting crime with the Ultra Teens, Juan trains to be an actor and stars in several school plays. He is currently rehearsing for the role of Curly McLain in the stage musical "Oklahoma!"

Juan's class schedule: