Gaito Kurozu, a sixth-grade student at Aibo Academy, commands the Dark Dragon World deck alongside his partner, the Black Death Dragon Abygale. His Buddyfighting tactics focus on dismantling opponents’ strategies through calculated deck destruction and harnessing the power of cards in the drop zone to fuel devastating assaults, often executed with his signature weapon, the Death Dragon Sickle. Cloaked in a grim reaper-like demeanor and an icy, detached presence, he paradoxically harbors a protective streak, shielding younger students from bullies, while secretly flinching at the sight of cats. Initially shrouded in mystery, Gaito’s true ambitions surface during competitions such as the World Buddyfight Championship, where he strives to validate his strength and Abygale’s prowess. His encounters with Gao Mikado oscillate between rivalry and grudging admiration, notably clashing during the GGG Cup in *X: All-Star Fight*. These confrontations catalyze the awakening of his Dragon Force—a dormant power unleashed by emotional surges during critical battles, driving his evolution as a fighter. Tensions with Tasuku Ryuenji thaw over time, culminating in a hard-earned alliance that signals Gaito’s reluctant embrace of camaraderie. His enigmatic ties to Kyoya Gaen, a shrewd benefactor, further complicate his journey as Kyoya strategically cultivates Gaito and Abygale’s potential. Facing threats like Wisdom’s mechanized legions in *X: All-Star Fight*, Gaito defies his aloof facade, mobilizing to defend allies and assert justice. His deck undergoes constant refinement, integrating Abygale’s advanced transformations and Dragon Force-enhanced cards that escalate his tactical versatility. This relentless adaptation mirrors his internal battles against self-doubt and external pressures, charting a path of resilience as he grapples with identity and the weight of expectations.