Chevalier d'Eon is a gender-fluid Saber-class Servant in Fate/Grand Order, inspired by the historical French diplomat and soldier. In the Fate series, d'Eon is portrayed as a noble, elegant protector who is deeply loyal to allies and skilled in swordsmanship and defense. They often serve as a calm, refined presence in the story, acting as a shield and support figure rather than a frontline aggressor. Their character emphasizes chivalry, identity, and devotion.