 He allows himself to be consumed by the Onyx Blade in order to pass on his power.Asagi

Asagi is a girl who was meant to be the main character of a future Nippon Ichi game, however this game possibly got scrapped, making her appear in various games as a post-game content, wanting to be the main character of the games where she appears.In Makai Kingdom she becomes Zetta's apprentice in order to become stronger, after this she seems to have turned on Zetta and arrives in Soul Nomad during the fight against Feinne.