Gegetsuburi (Zanpakuto spirit)

The spirit takes shape as a heavyset, bare-chested man with a notably flat nose and red hair styled into five spikes. A pale blue cape hangs from his neck, fastened by a heavy golden chain and lock, and a crescent-shaped scar marks his chest. He sports a piercing on the right of his lower lip and wears dark blue trousers cinched with a red belt and a large, hollow buckle.

While under Muramasa's control, the spirit is combative and boastful, picking fights, running down his master Marechiyo as an embarrassment he would never willingly serve, and swaggering about as the mighty Gegetsuburi. In combat he takes up the Onmitsukido style his owner belongs to, embracing surprise attacks and any tactic that leads to victory. Freed from the brainwashing, he warms to Marechiyo enough to fight at his side, though only if addressed respectfully as Mister Gegetsuburi, and the two bicker constantly while happily sharing meals, especially his beloved crackers.

Gegetsuburi first appears among the Zanpakuto spirits rallied by Muramasa, joining the assault on Seireitei and rampaging through it before deciding to capture Ichigo himself for the sport of it. He crosses paths with Omaeda but is knocked out by Ichigo and hauled to the Research Institute, where Mayuri Kurotsuchi uses him to learn that a spirit can only be freed if its own master defeats it. Revived, he fights beside Marechiyo to hold back the Gillians pouring from Muramasa's unstable power and helps close the Garganta, returning to the blade once Muramasa falls.

He resurfaces during the Toju Campaign, sharing kebabs with Marechiyo before joining the stand against the rogue swords and the final Toju, Kirikaze, to whom he surrenders his remaining energy so Renji can finish the fight. His Zanpakuto is unusual even sealed, taking the shape of a bag of chips he snacks from; released, it becomes a spiked ball on a chain with no special power, sturdy enough to bludgeon but easily cleaved by a Getsuga Tensho.