The (more or less) leader of the "pack," Kiba follows his instincts towards Paradise. When he was young, his pack and family were slaughtered when the forest where he lived was burned to the ground by Jagara's troops. He was then raised by a native who told him that he had a purpose, explaining why the forest spared his life. This native told him that he would have a great journey ahead of him, and that journey was to find paradise. Kiba begins his quest for paradise in the hope that there he will finally find peace. He tends to be distrustful of humans, and in the early episodes is reluctant to take a human form, even when it's more convenient. He also has a "love" for Cheza, which may only be due to the fact that she can lead them to paradise. Kiba seems to be an Arctic wolf in the series.
It is revealed later in the series that he is, in fact, the chosen one who is destined to find and open paradise.
(Source: Wikipedia)

Kiba's name means "fang" in Japanese.