Amano Hina

The library committee's leader who is normally like a caring and kind older sister, however she doesn't tolerate anyone breaking the rules nor making noise at the school's library. She becomes especially enraged at people not taking proper care of the books. Due to her love for literature, Hina often gives Yuuma advice regarding his writing.

She is one of Yuzuna's few friends, and often gets caught in lewd situations involving the grimoire. She also secretly writes doujin novels in her free time.