Hikaru Tezuka is a member of the Library Task Force and is initially ranked Librarian First Class, but is later promoted to Chief Librarian. He is drafted into the Library Task Force at the same time as Kasahara, though shows himself to be much more capable in terms of knowledge gained in lectures, clerical work in the base's library, and in typical combat. He finds it hard to give credit to Kasahara in the beginning since she is not up to what he considers to be the standards of a Library Task Force member, though he later recognizes her improvement and be one of her best friends.
