Circe is a Caster-class Servant in the Fate/Grand Order mobile game, based on the legendary Greek witch from the Odyssey. Known for her magical abilities and her habit of transforming humans into animals, Circe brings her mythological background into the Fate universe. In Fate/Grand Order, she serves as a supportive and quirky companion to Masters, often providing both comic relief and valuable assistance in battle. Her personality is cheerful and mischievous, making her a memorable and endearing character in the series.