K

Japanese name:	ケイ
Nickname:	"King", "Genma Kagutsuchi"

Genma, otherwise known as "K", is the first champion of Kaminohara's MS Colosseum. He lures Ren and his friends to the colosseum to battle Izanami the Inviter, who transforms into the corrupted Izanami Zero. Genma is also possessed by one of the War Gods, Doom, the Tide of War.

Voice Actor: Tsuda Kenjirou

Wikipedia