Riki

Breed: Akita Inu (Red)
Age: 0-3 (GDR), 5-8 (GNG)
Family:

The bear dog Riki, who was trained by Takeda Gohei, disappeared in the mountains during a fight with the bear Akakabuto. Riki lost his memory but never forgot his enemy. He gathered many dogs who were willing to fight against the monster bear, and became their leader. When he meets his son Gin for the first time he doesn't recognize him, even though he tries to remember. As he sends him and the soldiers out to find more dogs, Riki stays in the area of the bears, trying to hold his position.

In the GNG anime he is has brown fur instead of red.