He later meets and befriends a demon named Ohachiyo who renames him Mappa Douji (Demon Child), to avoid confusion between his and his mother's similar names, as the kanji could be pronounced both ways. Ohachiyo teaches Mappa Douji many things, and towards the end of the story he allows himself to be used in an oversoul, which additionally gives Mappa Douji the Reishi (霊視, Reading the Heart) ability, the source of Hao's future insanity.