Kai is Witch Bandora's willful son and prince of the Fairy Tribe. A spoiled and unprecedented delinquent, Kai had little sense of right and wrong, carrying out cruel acts such as smashing dinosaur eggs. However, his attitude took its toll on him when a mother Tyrannosaurus caught him red-handed breaking her eggs and angrily chased him off a cliff. The death of her beloved son drove Bandora mad with grief, blaming the dinosaurs for the accident and vowed revenge. She sold her soul to Dai-Satan in exchange for great magical power which she used to wage war on the other tribes as well as the dinosaurs, driving them to the brink of extinction before finally being sealed by the Guardian Beasts.