Heiji

Breed: Alaskan malamute mix Heiji is the leader of the small group of dogs in the mountains. He orders an attack on Riki because he smells of humans. Second time Heiji meets Riki is when he wants to kill Daisuke. Riki stops him, breaks one of his rib bones and wound him badly. Afterwords, Heiji leaves Riki alone after he finds out that he is Shiro’s son. But he never forgets the damage Riki brought to him and he wants revenge. (source: GingaSite.net)