Name: Lilith.

In Darkness and the Traveler of Hats and Books, Lilith is a librarian and the younger sister of Chumei. She always stays in the center of the library, and human beings can't see her. She looks like a 14-year-old girl, but in fact she is very smart. I am a perfectionist myself. Although my personality is simple, I always speak with grace. The clothes she wears are a kind of creature called ジョィ. Jun consists of a hat and a cloak, and the vertical edge of the cloak can branch and extend indefinitely. By controlling Jun, she can easily manage the books in this library as big as the universe. She likes Ye Yue and looks for the first beauty in the world with Ye Yue.