Muto Yukiji, a platinum-ranked bottle battler, channels his fierce competitive spirit through a striking rock-inspired persona. His tanned skin contrasts with a bold white mohawk streaked with yellow highlights, accentuated by a crimson lightning bolt tattooed on his right cheek. He dons layered vests—a blue one emblazoned with a black vortex emblem and a second black vest glittering with gold and silver pins—paired with a gleaming silver puka necklace, embodying his rebellious flair.

Specializing in swift, high-impact strategies, Yukiji commands the speed-type Bottleman Raijing Milk. Alongside his brother George, he merges music and combat as part of their rock duo, wielding instruments like electrified guitars to reshape battle arenas. Their performances transmute stages into metallic landscapes, amplifying vertical strikes. During critical clashes, their synergy unleashes the fused Ryujin Blendragon—a hybrid of Raijing Milk and George’s Jujin Black—that overwhelms opponents with barrages of simultaneous bottle-cap projectiles.

Rivals to the protagonists, Yukiji and George escalate battles into theatrical spectacles, blending shredding riffs with calculated precision. Their final confrontation tests the limits of their dual artistic and tactical mastery, underscoring their creed of seamless teamwork. The brothers’ legacy intertwines with the Megmilk Snow Brand namesake, a subtle nod to real-world inspiration, though it remains separate from their in-universe ambitions.