Greg Fou Seberg, a prominent member of the Prince’s Entourage and a capture target in the in-universe otome game, sports fiery red hair cut short, crimson eyes, and an imposing stature. His disheveled academy uniform—gray trousers, black shoes, a rumpled light blue shirt, and an unkempt black blazer—reflects his brash demeanor.

A staunch believer in raw skill, Greg thrives on fair combat, dismissing tactical gear as crutches for the weak. His reckless charges into battle, fueled by overconfidence, repeatedly lead to humiliating losses against Leon Fou Bartfort, who derides his refusal to adapt. A climactic duel sees Leon shatter Greg’s armor, forcing him to fight exposed, yet the defeat only sharpens his resolve for redemption.

Stripped of titles and engagements after the loss, Greg and the Entourage remain at the academy, training relentlessly. He engages in ventures like operating a festival café and battling air pirates, though Leon’s interventions overshadow his efforts. During one mission, Greg and Brad Fou Field procure Leon’s repaired armor only to falter against the pirate leader, relying once more on Leon’s aid.

Driven by rivalry, Greg collaborates with the Entourage to construct new armor from scavenged parts—a costly gamble symbolizing his tenacity. His pride intertwines with loyalty during group endeavors to reclaim their honor, balancing competitive friction with camaraderie.

Later arcs highlight Greg’s dedication to self-betterment and unwavering support for Marie, whom the Entourage collectively adores. His journey emphasizes resilience amid repeated setbacks, though unshaken boldness in battle often undermines his progress, leaving his growth a tempered blend of grit and recurring hubris.