Don Harumage reigns as a central antagonist across the franchise, masquerading as an evil warlock obsessed with resurrecting the demon Goburiki from his dimensional stronghold, Castle Hoi-Hoi. A pivotal twist reveals he is Goburiki’s own fragmented soul, severed from his sealed physical form—a connection fueling his consuming drive to reunite with his original body and regain omnipotent power, posing an existential threat to all dimensions.

Ruthless and authoritarian, he enslaves subordinates like Da Cider and Lesqua through manipulation and brainwashing, deploying corrupted mecha forces—once loyal allies of King Squasher—to enforce his will. He mercilessly punishes failure, cementing his tyrannical rule.

In *NG Knight Lamune & 40 EX*, remnants of Goburiki’s power resurface on Earth, reigniting his malevolent spirit and triggering interdimensional chaos. Heroes must thwart his resurgence before his full rebirth, highlighting his enduring menace even after apparent defeat.

Evolving from a direct foe to a harbinger of cyclical destruction, his schemes relentlessly test generations of heroes. His legacy echoes through later installments, marked by corrupted armies and psychological warfare. Rooted in ancient cosmic imbalances, his existence perpetuates a timeless struggle between primordial darkness and recurring heroism.