Keito was one of the demons, locked in a sacred shrine by the villagers. He's there locked for a hundred years and only free when the Red Festival begin. After the Red Festival ended, they make a ritual to locked the demon again. Keito is easily flustered and overwhelmed when it comes to things he cannot understand. He's highly serious, smart and quiet, sometimes shy. He rumorred as a dangerous demon, but he's actually caring and soft. He has red horns.