Kurotsuchi Nemu is an artificially created soul, a former lieutenant of the 12th Division of the Gotei 13 and assistant to Captain Mayuri Kurotsuchi. She came into being as the seventh incarnation of the Nemuri project, whose goal was to create new souls from konpaku cells. Mayuri called her his daughter, but treated her extremely cruelly, which made Nemu withdrawn and silent. Despite this, she remained infinitely devoted to her creator and was ready to sacrifice herself for him. Her body possessed many biological modifications, including increased endurance, immunity to poisons, and the ability to regenerate. Nemu died protecting Mayuri from Pernida Parnkgjas, but her brain was preserved by the captain.