Baku Ōmori, a sixth-year student at Aibo Academy, thrives as the mastermind behind Team Balle du Soleil’s deck strategies. Childhood companions Gao Mikado and Kuguru Uki rely on his knack for weaving fighters’ personalities into battle-ready decks, exemplified when he revamps Gao’s setup mid-match to shore up weaknesses. His perpetual hunger fuels both comedy and crisis—mental sharpness plummets without snacks, yet he brandishes a toolbox card case and obsessively dismantles gadgets between meals. Quick-tempered banter defines his bonds, particularly with Gao, though their fiery clashes never fracture mutual trust. A shadow looms from his past: once-revered mentor Retsu Omori, whose alignment with Disaster shattered Baku’s loyalty. Rejecting Retsu’s belief in decks dominating fighters, Baku champions designs that resonate with users’ identities. Their ideological war peaks during a tournament where Baku engineers counterstrategies, dismantling his former teacher’s tactics through evolved ingenuity. Subtle sparks fly with Kuguru, marked by flustered denials when their monster avatars interlock hands during a Link Attack. Later, her anxious vigilance during his hunger-induced collapse contrasts his dismissive craving for rice balls. Baku’s craft shapes pivotal moments—constructing Drum Bunker Dragon’s evolutionary decks, forging the Explosive Fang Dragon arsenal against Kyoya, and cracking Retsu’s cryptic clues to neutralize threats like Distortion Punisher!!. In later conflicts, he partners with Jin Magatsu to maneuver Gao toward crucial deck revisions, balancing tactical precision with personal flair. As Team Balle du Soleil’s strategic backbone, Baku anchors both their battle plans and team cohesion, proving devotion to harmony between fighter and deck remains his uncompromising creed.