Peterhausen, Ichiban Ushiro no Daimaou Wiki

Peterhausen first appeared in the series on episode 5 trying to kill Etou. Later in the episode, Sai defeated Peterhausen while saving Etou making Sai Peterhausen's master. Peterhausen is a dragon formed by the first demon king. He died in a war with his master. the current demon king in the series, Akuto Sai. Before Peterhausen died, he bit off his tooth as a remembrance gift.

Akuto Sai, Demon King Daimao Wiki

Ichiban Ushiro no Daimaou episode twelve (final)

If you could take part in a 7v7 Holy Grail War using anime characters, who would you choose as your team? : r/anime

Junko Hattori, Ichiban Ushiro no Daimaou Wiki

Demon King Daimao Episode 12 Review - Best In Show - Crow's World of Anime

List of Episodes, Ichiban Ushiro no Daimaou Wiki

Akuto Sai VS Battles+BreezeWiki

Who would win the fight? Akuto Sai or Rimuru Tempest? - Quora

Demon King Daimao Episode 12 Review - Best In Show - Crow's World of Anime

Peterhausen, Ichiban Ushiro no Daimaou Wiki

Korone from Demon King Daimao

Ichiban ushiro no dai maō - Wikipedia

Peterhausen, Wiki