Youkai

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

Appearance
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.

Abilities
The abilities of each Youkai differs in accordance to the species. However, 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 Youkai
{| border="1" cellpadding="1" cellspacing="1" class="article-table" style="width: 650px;" ! scope="col" style="width: 650px; background-color: rgb(120, 0, 0); border-color: black; height: 10px;"|

Kitsune

 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|
 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|

Kitsune are fox-like Youkai known for their ability to control fire. ! scope="col" style="width: 650px; background-color: rgb(120, 0, 0); border-color: black; height: 10px;"|
 * Kyuubi (a.k.a. Ninetails)

Nekomata

 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|
 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|

Nekomata are cat Youkai capable of using Senjutsu and Youjutsu. ! scope="col" style="width: 650px; background-color: rgb(120, 0, 0); border-color: black; height: 10px;"|
 * Nekoshou

Monkey Youkai
! scope="col" style="width: 650px; background-color: rgb(120, 0, 0); border-color: black; height: 10px;"|
 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|
 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|

Yuki-onna

 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|
 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|

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. ! scope="col" style="width: 650px; background-color: rgb(120, 0, 0); border-color: black; height: 10px;"|
 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|

Kappa
A race of water Youkai. Noted for having plates on their head and a fondness for cucumbers. ! style="height: 5px; background-color: rgb(120, 0, 0); border-color: black;"|
 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|
 * style="text-align: left; vertical-align: top; width: 650xp; background-color: rgb(50, 0, 0); border-color: black;"|

Karasu-Tengu
Karasu-Tengu are bird-like Youkai with black wings and crow heads, dressed like mountain hermits. ! style="height: 5px; background-color: rgb(120, 0, 0); border-color: black;"|
 * style="height: 5px; background-color: rgb(50, 0, 0); border-color: black;"|
 * style="height: 5px; background-color: rgb(50, 0, 0); border-color: black;"|

Nue
Nue are Chimera-like Youkai with the face of a monkey, the limbs of a tiger, and a snake for a tail.
 * style="height: 5px; background-color: rgb(50, 0, 0); border-color: black;"|
 * style="height: 5px; background-color: rgb(50, 0, 0); border-color: black;"|
 * One of these Youkai currently resides within Souji Okita.
 * }

Known Youkai

 * Yasaka
 * Kunou
 * Koneko Toujou
 * Kuroka
 * Bikou
 * Sun Wukong (former)

Trivia

 * Sun Wukong, a former Youkai, is the only known being to have gained power equivalent to a God without having started out as one.