Remi Takashima
Remi Takashima is a four year girl. The building which Remi lived in had burned down. After going through the remains, firefighters found her buried under some rubble, and amazingly, she was still breathing. Assuming Remi possessed the beast gene, she was kept alive to be used as a guinea pig.
After being observed in the hospital, she once again unintentionally starts a fire. Jun is sent in to eliminate Remi. After being attacked by her fire, Jun transforms, but still tries to confront Remi without hurting her. We see a flashback, and learn that, after finding an interest in fire, Remi found that she had the power to start fires with her mind. Remi unintentionally started a fire in her room. Her mother came in to her room to get her, but after touching Remi's hand, she caught on fire and burned to death.
Remi calls for her mother, and walks toward Jun, arms open. Jun hugs Remi, and the fire surrounding the child slowly dies out. Jun hugs Remi one last time, and the child cracks and falls apart. All of this having started because Remi possessed the Beast gene, and was unable to control her powers.