Childhood friend of Kamui and sister of Fuma, Kotori is a high school girl with a heart of gold. She has simple hopes and desires, wishing for a pleasant future. Her past is marred with tragedy, including the mysterious and bloody death of her mother six years ago.

Sweet, innocent Kotori is a character of great compassion and conviction. She is optimistic despite all that has transpired in her life. Surprisingly, she is not afraid to be opinionated, letting others know exactly what she is thinking. Although strong in spirit, her body is physically feeble.

Kotori has dreams of the future, almost like those of a dreamgazer.