Red Fang: Blue Sonnet

Sonnet is a cyborg and esper from a rough past, now trained to be the ultimate warrior and the most powerful weapon in the world. She is sent to Japan to watch over Komatsuzaki Lan, who is believed to be controlled by the rage of the esper Akai Kiba ("Crimson Fang"). Lan is a quiet girl who knows she is different from everyone else and begins to show signs of Crimson Fang after coming into contact with Sonnet. As she fights Lan, Sonnet starts to rediscover her own humanity. At the same time, Lan must struggle to keep her humanity and control the Crimson Fang.