Culverin Bear commands the Bear Team within the villainous Gekko organization, having risen from human origins to a surgically enhanced "Monster"-class hybrid fused with a bear. His towering frame boasts dense brown fur and piercing white eyes, embodying both brute strength and tactical authority. A gruff, no-nonsense leader, he clashes with insubordinate subordinates like Reaper Princess, whose reckless decisions often force him into unplanned confrontations.

Though stern in command, he shares a nuanced bond with Steel Princess, a comrade-turned-lover. Their partnership oscillates between battlefield synergy—such as coordinated strikes against the Gelato 5—and tense disagreements over her impulsive tactics. This duality extends to his arsenal: twin energy Culverin Cannons dominate his combat style, though their upgraded Neo prototypes met destruction during Reaper Princess and Red Gelato’s sabotage, crippling Gekko’s base. Persistent rebuilds and weapon innovations underscore his resilience.

Notable missions reveal his strategic pivots: retreating from Red Gelato at an amusement park only to engage under Reaper Princess’s provocation, or aiding allies against the rampaging Ultimate Phantom, which briefly engulfs him before his extraction. Beyond warfare, he navigates unexpected levity, like a cosplay festival blunder where a bear-costumed civilian sparks chaotic confusion. Such moments contrast his battlefield ferocity, subtly humanizing him without undermining his loyalty to Gekko’s ambitions.