Alberic Gillet, a noble cavalier of the Kingdom of Vemac, serves within the Post-war Reconstruction Implementation Agency, Kleeman, following the Gaz Empire's defeat. His mission is maintaining continental peace. He commands the specialized Gillette Corps, tasked with preventing renewed conflict. This duty frequently places him in pursuit of Chaika Trabant and her allies, aiming to obstruct her mission of gathering Emperor Gaz's remains. Physically, he possesses short blonde hair and blue eyes, embodying a conventional noble appearance.

Initially driven by a strong sense of justice and idealism, Alberic's worldview underwent a profound transformation after Guy, one of the Eight Heroes, saved him during a critical event. This rescue altered his personality, making him noticeably more taciturn and adopting a merciless approach toward perceived threats. Guy recognized Alberic as fundamentally unsuited for peacetime, possessing an intrinsic longing for the structure and purpose of warfare.

As a leader, Alberic demonstrates natural charisma, commanding loyalty from subordinates including Viivi Holopainen, Zita Brusasco, Nikolay Autotor, and Mattheus Callaway. He maintains a professional yet distant dynamic with Viivi, remaining unaware of her romantic feelings despite their close alliance. His tactical decisions reflect pragmatism, such as questioning the wisdom of transporting a secret weapon via a conspicuous mechanical carriage in daylight and prioritizing intelligence gathering through field reports.

In combat, Alberic is proficient with a longsword. His operational focus remains executing Kleeman's mandate to stabilize the postwar political landscape, consistently placing him in direct opposition to Chaika's objectives.