Don Vodka is a part-android integrated into the Giga Genos, a massive spaceship designed for planetary assaults. His cybernetic transformation resulted from witnessing his home world's annihilation after the ancient mecha Dark Knight was activated by someone other than the true Warrior Ramunes. This tragedy fuels his singular purpose: to find the genuine Warrior Ramunes, the only one capable of controlling the Dark Knight and stopping further galactic destruction.

He initially serves as an ally to the tyrannical Ramunes IV, commander of the Giga Genos fleet, but later reveals that Ramunes IV is an impostor—a childhood figurehead chosen to maintain morale while the real Ramunes remained hidden. This deception collapses when Don Vodka, injured during the holy virgins Cacao and Parfait's infiltration of the Giga Genos, discloses the truth to them. He warns that the impostor's activation of the Dark Knight will inevitably cause planetary destruction, echoing his own world's fate.

His role as an informant ends abruptly when Electone, Ramunes IV's android companion, overhears his accusation. Enraged by the claim against Ramunes IV, Electone executes Don Vodka to silence him. His death prevents him from witnessing the climax, where the child Lemon is revealed as the true Warrior Ramunes and halts the Dark Knight's rampage.