Kiyohime is a Berserker-class Servant in Fate/Grand Order, based on the Japanese folklore figure of the same name. Originally a human woman who transformed into a serpent demoness due to unrequited love and betrayal, she embodies obsessive devotion and jealousy. In the Fate series, she expresses exclusive affection toward her Master, displaying intense loyalty mixed with dangerous possessiveness. Her legend stems from the classical tale where she burned down a temple in her rage. As a Servant, she retains her passionate and volatile nature, making her both a devoted ally and a potentially dangerous companion depending on how her emotions are managed.