 Another of Aizen's early experiments in blending hollow and Soul Reaper abilities, created from Soul Reaper souls, White is a black-colored, horned, humanoid hollow.Years before the events of the series, White hunts Soul Reapers until he is defeated by the combined efforts of Isshin Shiba and Masaki Kurosaki.However, it is revealed that Aizen created White with the ability to infect his victims with a fragment of his spirit to induce hollowification.