Xavier, an immortal being who is believed to rule the southern forest. Legend says he has the appearance of a devil, is heartless, cruel, and likes to kill, Even though the truth is that he is just an immortal being tasked with guarding the forest. And here she was, a little girl who was friends with him. Xavier was cold and stoic towards her, but never hurt her. And this brave little girl, Ruu, always visited him when she walked in the forest.