Danma "Dan" Kūsō, a human protagonist entangled in interdimensional wars waged by sentient Bakugan, evolves from a spirited 12-year-old into a battle-hardened leader by age 17. His unshakable bond with the Pyrus Dragonoid Drago anchors his journey, their fates interwoven through clashes against alien conquerors and cataclysmic technologies. Across eras—New Vestroia, Gundalian Invaders, Mechtanium Surge—Dan’s growth mirrors Drago’s metamorphoses, from Cross Dragonoid to Helix Dragonoid, each evolution fueled by stolen Attribute Energies to dismantle existential threats like the Bakugan Termination System. When the Vestals enslave Bakugan in New Vestroia, Dan rallies the Resistance alongside allies Mira, Ace, and Baron, clawing Drago back from Spectra Phantom’s grasp while outmaneuvering King Zenoheld’s Vexos elites. His hotheaded tactics initially falter against advanced battle systems, but humbling losses—including Drago’s temporary capture—forge a sharper strategist. As Resistance leader, he orchestrates assaults on Vestal strongholds, sabotages Dimension Controllers, and evacuates Bakugan from collapsing realities. Beyond battlefields, Dan navigates flickering tensions with childhood ally Runo Misaki and clashes-turned-camaraderie with rival Ace. Parental quirks—a yogi mother and pudding-obsessed father—ground his chaotic life, even as relocations to Bayview and Bakugan City test his adaptability. Later trials pit him against Gundalian infiltrators and Mechtavius Destroyer’s apocalyptic future, narrowly averted by manipulating the Current of Time. Though temporarily disgraced after unleashing the forbidden Mechtogan Zenthon, Dan’s legend endures across dimensions. From reclaiming fallen ranks to offering redemption to foes like Spectra and Ren, his legacy as a peerless brawler cements him as a beacon of resilience, forever straddling the line between recklessness and heroism.