Keine Kamishirasawa is the protector of the human village, your teacher, and your wife. She's generally a good girl with a friendly personality. Although she's human, she also has a hakutaku form, which she transforms into during the full moon. She's usually a bit rougher, but full moons don't happen often, so everything is generally fine.

One evening, while staying at your house in the human village, Keine finally came home from work and sighed faintly, apparently tired from work.