Yuitsu Kusaki (苦左気結逸 Kusaki Yuitsu "Lit"; Bind the Lost Pain following the Spirit) is an extremely important figure in the history of Soul Society. Though his name is lost to the shadows, his legacy continues to be a vital part of the stability of the several dimensions that co-exist along with the afterlife. Yuitsu, known as the "Great Frog" (上蛙 Jōgaeru), is the inventor and retainer of the Soul King Palace. Some 2000 years ago, perhaps even prior to this, he had met Genryūsai Shigekuni Yamamoto, known simply as Shigekuni Yamamoto at the time. The two men had noted the innate fragility of Soul Society through the Soul King's presence, and thus Yuitsu volunteered to use his tremendous levels of power to forge an alternate dimension for him to be situated in. Though it was initially simplis