Rou Dai Kaiôshin

Rou Dai Kaiôshin (english dub Elder Kai) is a character from the Animes Dragon Ball Z and Dragon Ball GT. He looks kind of like the East Kaioshin, but with a much uglier face.

Rou Dai Kaiôshin is a Kaiô who came out of the Z sword. He was trapped there by an old enemy and Gohan releases him from the Z sword, during the Majin Buu Saga when he breaks it while trying to cut a block, which was made of the densest material in the universe (called Kachink). After being released, he agreed to help unlock Gohan's hidden power so he can defeat Majin Buuin exchange for a kiss from an Earth woman (Bulma). Rou Dai Kaiôshin is like Muten-Rôshi in manner, but a lot more intelligent and powerful.

Long ago he used to be a lot more handsome (by his own standards anyway) but an ugly witch came up to him and stole one of his Potara Fusion Earrings and put it on. Rou Dai Kaiôshin was instantly combined with the witch permenantly, while increasing his ugliness it also increased his power.

In the Fusion Saga he sacrifices his own life so Son Goku can live, and gives him the Potara earrings to fuse with Gohan on Earth.

Rou Dai Kaiôshin always warns the Z Fighters about using the Dragon Balls too often, and in GT it appears they should have heeded his warnings, as seven Shadow Dragons come out of the balls from overuse, and build-up of negative energy.

In the Bebi Saga of GT, Rou Dai Kaiôshin helps Goku to become much stronger by regrowing his tail, a painful process involving a giant set of pliars, and after Goku has his tail he is able to turn Super Saiyan 4 and defeat Bebi.