Yuko Sakaki

Student at Shiroiwa Junior High, Third Year Class-B. She grew up in a religious family, but is prone to faith-based delusions and hallucinatory episodes. She handles violence very poorly and is quite physically frail and mentally unstable. In the Program, she is picked up by Yukie's gang and stays at the lighthouse, where she becomes afraid of Shuya, believing him to be possessed by demons and calling him "Demon Boy".