Ren Kibo is a typical 15 year old girl from the ancient mythical japanese village of shinri but: 1. She is one of 2 descendants from the godess unemi, Her and her sister chiyoko suzu who've never met or known of each other and 2. She holds part of the spirit of the thousand year old beast Senjō, Who wants to destroy the planes of which There are four. When Ren was 3 Her parents were killed by Senjō who was draining the energy of humans. When Ren was being drained the symbol on her arm lit up, protecting her and hurting Senjō. Senjō was in pain so she fled. she absorbed The power released from Senjō, the symbol stopped it from killing her and transforming into a demon but the symbol was weakening and wouldn't hold forever, slowly mixing the light and darkness together into her blood. Now at 15 the symbol barrier is weak, shes slowly dying and she has two choices, find the only one who can help, chiyoko or take an antidote which destroy the dark but also the light, erasing her memory