White

White is a Hollow of near-total blackness, offset by a pale mask that closely mirrors the one Ichigo Kurosaki wears while Hollowfied. Pale white hair reaches roughly halfway down its back, and a pair of horns juts forward from either side of its skull. In place of hands, each forearm tapers into a blade, and a red, filled-in hole marks its upper chest.

Though it operates on raw instinct like other Hollows, White carries a cold, calculating edge, reflexively singling out the weakest targets on a battlefield first. It rarely makes a sound beyond roaring and ignores any questions put to it, yet Isshin Shiba felt during their fight that he faced something closer to a Shinigami, even a Menos, than an ordinary beast. Every Shinigami it devoured left it stronger and sharper than before.

White is one of Aizen's experiments, assembled from the souls of numerous Shinigami long before he turned on Soul Society and built to overpower any captain limited to Shikai. After it slaughtered Shinigami in Naruki City, Tenth Division Captain Isshin Shiba came to hunt it down. Drawn out by Isshin's spiritual pressure, the Hollow cut down bystanders and then engaged him directly, trading its bladed arms against his sword and firing a purple Cero at an approaching Shinigami. When Isshin released his Zanpakutō, White lost an arm, and as Masaki Kurosaki joined the fight it lunged in to bite her shoulder before she drove a Heilig Pfeil clean through its head.

Gravely hurt, White triggered the self-destruct hidden in its hollow hole, and Isshin threw himself over Masaki to shield her from the blast. The bite proved to be its real aim, marking Masaki for Hollowfication as the creature reached its final transfer stage. Having slipped inside her soul, it began turning her Hollow and pushing her toward Soul Suicide, until Isshin used a special Gigai devised by Kisuke Urahara to tie his own soul to both of them and hold the transformation at bay. Years later that lingering essence carried over into Ichigo Kurosaki, merging with his Shinigami power and taking shape as the spirit of his Zanpakutō, Zangetsu.