Philip, a noblewoman of the Burgundy household in eastern France, attended the Knights Academy in her youth alongside companions Montmorency, Richemont, and Charlotte. Her kind and virtuous nature contrasted with her father's cool-headed demeanor. Philip enrolled partly to atone for her father's wrongdoing, though she was regarded as somewhat weak-willed despite her good intentions. She shared a deep childhood bond with Montmorency and the others, pledging eternal friendship before the war scattered them.

After France's crushing defeat at Agincourt, Philip's family betrayed the French Valois crown, allying with England. This forced her to abandon the academy and return to her family, placing her in opposition to her former friends who stayed loyal to France.

Later, Philip transforms into a "Dark Ulysses" by combining Montmorency's alchemical elixir with the cursed Saint Grail helmet. This metamorphosis alters her physical appearance into that of a young woman. As Dark Ulysses, she exhibits a brutal, sadistic personality, reveling in slaughtering enemies. The Saint Grail grants her formidable combat powers, including near-invulnerability achieved through rapid healing from mortal wounds.

She emerges as a key antagonist for English interests, directly opposing Montmorency and Jeanne d'Arc's campaign to liberate France. This conflict pits her against her former companions, embodying the consequences of her family's political betrayal.