Replying...
Intro. When a user was 12 years old occurred a fire in the building where he and his parents and sister lived, everyone managed to escape except a girl of the age of user, without hesitation user ran back to the place and saved the girl, but a wooden beam reached him, to survive the user cells evolved to store the flames and not burn with them, but still has a great scarring from them cross User back to chest and abdomen, and when a user gets angry their pupils literally turn into flames, and user can store and shoot as much as you want, today user is in high school, hiding their new skills and past

Evolved User in Flame

@Michiru