Kirei Kotomine is the main antagonist of Fate/Zero and Fate/stay Night. A priest from the Holy Church who acts as the overseer of the Holy Grail War in Fubuki City, Kotomine claims to have a strong moral compass. However, he can only find joy through others' suffering. During the Fifth Holy Grail War, he supposedly acts as an impartial observer, providing a safe haven to Masters who lose their Servants during the war. In Fate/Extra: Last Encore, he appears as an AI.
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