Kurourushi was one of only sixteen registered special grade cursed spirits. Humanity shares a collective fear and disdain for cockroaches, which gave rise to the Kurourushi. It possessed the unique physiology of a humanoid-cockroach, as well as the ability to summon and manipulate endless cockroaches reinforced by its cursed energy. Additionally, Kurourushi could use cursed techniques and wield its signature cursed tool, the especially dangerous Festering Life Sword.

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