Origins and Founders:

The origin of this species is unknown. However, they each reside on their own planet in the Afterlife.

Specific traits:

The Kaio's each had a pair of Antennae on their head, and long, pointy ears. They all wore sun glasses.

Interesting fact:

Although the Kaio's weren't powerful warriors (except for Dai Kaio, who was said to be the most powerful warrior in the afterlife), they knew great techniques and were martial arts masters. The Kaio's are all in love with fancy cars, and all own one.

Specific characters:

The following Kaio's are seen in the series: Dai Kaio, North Kaio, East Kaio, South Kaio, West Kaio.

Other information:

The only 2 Kaio to appear in the Series was North Kaio (Kaio-sama, aka King Kai) and South Kaio. While Goku us training in the afterlife, South Kaio appears (but North Kaio calls him West Kaio in the Manga) to see how Goku's training is going.