Standing at an imposing 210 cm with grey hair and black eyes, Grenadier presents a formidable mercenary presence. His background spans extensive combat across stellar battlefields, driven by high-paying assignments to secretly aid desert inhabitants of Planet El Alamein—a world he helped devastate in prior military actions. Initially wild and untamed, suited solely for warfare, Grenadier gradually cultivates loyalty and respect for Captain Warrius Zero while serving aboard the battleship Karyu. This professional bond evolves into mutual trust as Grenadier aligns with Zero’s leadership during missions. His combat role prioritizes direct engagement, leveraging his formidable battlefield presence.