Stage 3 boss. Although half-human and half-beast, she appears perfectly human except during the full moon, when she grows horns. She was not born with therianthropy, and only became a were-hakutaku due to an unknown incident. She loves humans, and considers it her duty to protect the human village, by consuming the village's history to hide it when malicious yōkai pass by; her special ability. However, she is trigger-happy and sometimes mistakes ordinary travelers for such malicious yōkai. Keine opened a terakoya in the village and spends her time teaching children and compiling historical records. She seems to be good friends with Huziwara no Mokou. She has a very strong desire to protect humans, and is probably the safest person for anyone in Gensokyo to be around.