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Youkai (妖怪, Yōkai) are a group of various species of supernatural beings native to Asia shown in High School DxD.


Youkai have many different appearances, dependent upon the specific species. From the fox-like kitsune (such as Kunou and Yasaka) to the cat-eared Nekomata (such as Koneko and Kuroka). However, most Youkai either possess a human-like form with animal aspects, or can assume such a form.


The abilities of each Youkai differs in accordance to the species. There are two distinctive types of Youkai, the Japanese Youkai and the Chinese Youkai. There are Youkai who have shown the ability to rival an Ultimate-Class Devil and are commonly known as Daiyoukai (大妖怪, Daiyōkai, lit. "Great Youkai").

Types of YoukaiEdit


Kitsune are fox-like Youkai known for their ability to control fire.

  • Kyuubi (a.k.a. Ninetails)


Nekomata are cat Youkai capable of using Senjutsu and Youjutsu.

  • Nekoshou

Monkey YoukaiEdit

Monkey Youkai are youkai that have the physical resemblances to that of a monkey.


  • Issei's imagination of what a Yuki-onna is supposed to look like.

Yuki-onna are a rare race of ice Youkai. Portrayed in legend as looking like beautiful women, their true appearance is of large white ape-like beasts with a freezing breath that can freeze an opponent in seconds. Also known as Yeti.


A race of water Youkai. Noted for having plates on their head and fondness for cucumbers.


Karasu-Tengu are bird-like Youkai with black wings and crow heads, dressed like mountain hermits.


Nue are Chimera-like Youkai with the face of a monkey, the limbs of a tiger, and a snake for a tail.

  • One of these Youkai currently resides within Souji Okita.

Known YoukaiEdit


  • Sun Wukong, a former Youkai, is the only known being to have gained power equivalent to a God without having started out as one.
  • Yuki-onnas are actually beautiful girls when they are still young, but turn into gorillas when they mature.


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