Yuu Aikawa

Honest, straightforward, and friendly. His childhood friend is Mitsuki, whom he cares a great deal for, and he takes it upon himself to protect her at all costs. Mitsuki is also the only person that Yuu completely trusts within the group. Yuu found himself inside the hospital after receiving a blow to the head from a wrench inside the bathroom at the karaoke bar. He also seems to be the only person who has caught a glimpse of the wolf. He's the only one who doesn't have a bar code tattooed on his skin which, the group discovers, are the keys to unlocking the network of doors keeping them trapp