Max, a mechanical AI entity designated as a B't, embodies the Black Tortoise of Chinese mythology (Xuanwu) and its Japanese counterpart, Genbu. Partnered with Hokuto, a Spiritual Guardian of the Machine Empire, Max functions as both a mobile fortress and a defensive bulwark. Its colossal form houses an underground laboratory shielded by nearly impenetrable armor, engineered to endure subterranean missile assaults. An energy-based Protective Shield further augments its defenses, solidifying its status as the Empire’s ultimate safeguard.

Within documented events, Max and Hokuto prove pivotal in resurrecting Teppei Takamiya and his B't X following their near-fatal defeat, upgrading X’s systems for ensuing battles. During the climax of *B't X Neo*, they join a sacrificial coalition of Spiritual Generals to halt the cataclysmic advance of the evolved B't Raphael. Channeling energy from a solar capsule, Max and Hokuto dissipate alongside their allies, their self-destruction averting global annihilation. Their final exchange of resolve with their human partners underscores the narrative’s core themes of sacrifice and enduring legacy.