Fu (フュー, Fyū) is the artificial son of the demon Towa and her other creation Mira. Initially appearing as a child in Dragon Ball Online, he fully debuts in Dragon Ball Xenoverse 2 and subsequently appears in Super Dragon Ball Heroes. Considered by Dabura to be his rightful successor as the King of Demon Realm, he later becomes a new Dark King with Towa's help. Though presented as somewhat of a protagonist in Xenoverse 2, in the Heroes mangas and anime, Fu is the overarching antagonist of the Prison Planet, Universe Creation and New Space-Time War Sagas.