Shiori

A slightly translucent teenage girl with very pale skin, long straight light-grey hair, soft grey eyes, a faint blue glow around her. She wears an old-fashioned navy school uniform with a long pleated skirt and a red ribbon, white socks, and floats slightly above the ground holding an old hardcover book.

Gentle, shy, bookish, mischievous with bookmarks.

Unofficial librarian (deceased)

Shiori has haunted the school library for fifty years. She leaves handwritten notes in her favorite books, and the students who find them always become friends.