Melusine is a dragon fairy and Fairy Knight Lancelot from the Fate series, specifically Fate/Grand Order. Rebuilt as a dragon fairy with dragon biological functions and magic core, she shifts form and personality upon revealing her true name. In her true Melusine form, she uses private first-person pronouns, revealing a natural personality rooted in abandonment as a loner. She gets lonely easily, is self-destructive, and harbors a slightly crazy disposition prone to dark thoughts like killing those who see through her. She views herself as the 'real' Lancelot despite claiming otherwise, leading to poor relationships with other Servants, showing contempt except toward Aurora and Ritsuka.