Mana Ouma

A pink-haired girl who has a mysterious connection with Shu, Gai, Inori and Shuichiro. She is later revealed to be Shu's older sister. Ten years ago, Mana rescued a young Gai who she named Triton. Shu and Gai loved Mana as she was a sweet, kind person. However, unknown to Shu during that time, Mana was the first person to be infected with the Apocalypse Virus whos crystallization effects were still minimal but was making her unstable and sociopathic that she started to have incestous feelings for her brother. Mana was also the cause of the Lost Christmas incident when on that day, Mana discov