Jeanne Euphoria, younger sister of Maria Euphoria—former empress of the Gran Chaos Empire—rises as queen of the Euphoria Kingdom following the empire’s collapse after its defeat by the Great Tiger Kingdom of Haan. Mirroring her sister’s appearance, she binds her golden hair in a ribbon-tied ponytail, her blue eyes reflecting a resolute, pragmatic spirit that contrasts Maria’s idealism. As the empire’s supreme military commander and later sovereign of her nascent kingdom, Jeanne blends strategic brilliance with diplomatic finesse, navigating post-war upheavals and forging covert alliances.

Her realism aligns with leaders like Souma E. Friedonia, whose innovative policies she admires. During the One Week War, she mediates the occupation of Van, enforcing Amidonia’s reparations while upholding the Mankind Declaration Treaty. Behind the scenes, she negotiates deftly with figures like Friedonia’s Prime Minister Hakuya Kwonmin, cultivating a rapport through candid exchanges over the Jewel Voice Broadcast.

A seasoned warrior, Jeanne’s swordsmanship earns recognition from allies like Juna Doma, though she humbly assesses her limits against elites such as Aisha Udgard. Beyond combat, she stabilizes her fractured realm through calculated diplomacy, balancing idealism with governance grounded in geopolitical pragmatism.

Her dynamic with Maria shifts from loyal supporter to equal ruler, openly challenging her sister’s tendencies while preserving their bond. This evolution underscores Jeanne’s transformation from a secondary figure to a monarch who steers her kingdom through turbulent shifts, prioritizing stability and prosperity amid the ashes of empire.