Charlotte is the librarian of Keep Outers’ Paris Division. She has a collection of keys that can open anything, all due to her owl’s special ability to identify and duplicate keys. Within that collection are special keys that can open more than just doors, such as people’s hearts and their deep secrets.
Hiding behind her rigid personality and proper British outfit, Charlotte’s powers and talents actually originated from shamanism. However, she is deeply ashamed of such identity and has kept it a secret herself. Will she eventually learn to open up and accept herself?