Gaul Galette des Rois, the 13-year-old prince of the Galette Lion Territory and younger brother of its ruler Leonmitchelli, balances fiery determination with royal responsibility. Confident and hot-blooded, he commands unwavering loyalty from subordinates like General Godwin and the Imperial Guard trio Genoise, while remaining cherished by Galette’s citizens. His combat style prioritizes agility and light armor, mirroring that of his rival Cinque—a figure he targets to prove his strength and avenge his sister’s defeat, even orchestrating Millhiore’s abduction to force a confrontation.

Beneath his aggressive exterior lies a nuanced bond with Millhiore, marked by mutual respect and an appreciation for Biscotti’s forests, cuisine, and people. Fleeting remorse shadows his actions, yet his resolve stays steadfast. In battle, he channels Emblem Arts such as Bright Power Open, amplifying his physical and defensive abilities to reflect his unyielding self-assurance.

Leading the elite Genoise unit—Noir, Jaune, and Vert, who reverently call him "Gau-sama"—Gaul’s tactical prowess shines. His rivalry with Cinque matures through clashes, blending competition with grudging admiration. This dynamic underscores his growth: a prince torn between impulsive pride and introspective nobility, striving to reconcile his methods with the weight of leadership.