Aura

The Aura is a special power used by the members of each of the eight King Clans. The aura a person uses depends on which Clan they belong to. To symbolise which clan you belong to when you pass their entrance exams, the respective King gives you a mark of said clan anywhere on your body, making you an official member.

Rankings
The Kings seem to each be given a specific number. If this is a ranking on their strength or just the order in which they became Kings is yet to be revealed.
 * 1st: Adolf K. Weissmann
 * 2nd: Daikaku Kokujyouji
 * 3rd: Mikoto Suoh
 * 4th: Reishi Munakata
 * 7th: Ichigen Miwa

Etymology
Sometime long ago in history, there were seven Kings who lead their respective clans. However, for unknown reasons, a feud began between them and the clans seperated, becoming enemies. Now, centuries later, the feud between the clans begins to escalate again, because of a certain case regarding Isana Yashiro.

The Clans and their Auras
There are eight clans in K, each lead by a King, which is represented by a colour. They each have a unique aura.

The Red Clan
The Red King: Mikoto Suoh

Group (Clan): Homura

Aura: Flame/Fire Aura

Characteristics of the Flame Aura: All members of Homura possess this ability. This aura has a very destructive force to it, and can incinerate almost any and everything it it's path. It's color is red or pink. Their group insignia is red and black flame.

The Blue Clan
The Blue King: Reishi Munakata

Group (Clan): SCEPTER4

Aura: Lightning Aura

Characteristics of the Lightning Aura:  All members of SCEPTER4 possess this aura. This aura has the ability to strike opponents in quick succession and can attack multiple areas at once. It's color is blue.

The Silver Clan
The Silver King: Adolf K. Weissmann

Group (Clan): Unknown

Characteristics: Unknown

The Gold Clan
The Gold King: Daikaku Kokujyouji

Group (Clan): Unknown

Characteristics: Unknown

The Pink Clan
The Pink King: Unknown

Group (Clan): Unkown

Aura: Unknown

Characteristics: Unknown

The Green Clan
The Green King: Unknown

Group (Clan): Unknown

Characteristcs: Unknown

The Orange Clan
The Orange KIng: Unknown

Group (Clan): Unknown

Characteristics: Unknown

The Black Clan
The Black King: Unknown

Group (Clan): Unknown

Characteristics: Unknown