Yuuma Toutetsu

Yuuma Toutetsu is the leader of the Gouyoku Alliance under which the eagle spirits serve. She is briefly mentioned by Saki Kurokoma in the Extra stage of Wily Beast and Weakest Creature before making a proper appearance as the final boss of Touhou Gouyoku Ibun. She is clever, calculating, and avoids pointless conflict by nature. She exhausts all the other organizations within the Animal Realm because they feel her methods to be dishonest and cowardly, but her underlings adore that sort of thing from their "way-too-reliable boss with nearly-invincible power." And as per her ability, the things she eats can influence her personality, so it may vary from time to time.