Rin Kurenai
, 紅 鈴
A transfer student whom Eiji has a crush on.
Spoilers:
Her Father and Mother were killed in the disaster 10 years ago caused by Eiji. She swore revenge and using her Order of Immortality, she attempts to assassinate Eiji. Failing after Eiji orders her to follow him and never attempt to kill him or his step-sister Sena again, she resolves to murder him herself using indirect means.
