A sage of the hermits. He lives a long life, seeking knowledge, without eating or sleeping, having lost his human nature. Depending on who sees him, he appears to be a woman, an old man, or a child, and no one knows what he really looks like. He is called the "Gray Sage" because of the only thing he has in common with other people: his entire body is gray. He favorite thing to do is to gain new knowledge. What she hates is the intense despair that comes to her on a regular basis.

仙人の賢者。人としての理をはずれ、食べる事も寝る事もせず 永き時を生きながら知識の探求を続けている。見る者によって女性だったり老人だったり子供だったりするらしく、本来の姿は誰も知る者がいないが、唯一の共通点である全身灰色の姿から、「灰色の賢者」と呼ばれている。好きなことは新たな知識を得る事。嫌いなものは定期的におとずれる激しい絶望。