As a cursed object, Eso was ranked special grade. Eso was incarnated by Mahito's group in order to aid in helping curses to take over Japan. Despite ultimately being defeated by jujutsu students, Eso and Kechizu were entrusted with retrieving one of Sukuna's fingers and nearly killed the students attempting to do so. Eso's power proved to be greater than that of his younger brother, but both of them pale in comparison to their eldest brother, Choso.