Kumada

Kumada is the trainer at Boxing Gym Bear. He teaches Okami how to box. He is named by the narrator around 11:15 into episode 6.

He is probably modeled after the boxing coach of Makunouchi Joe, in the anime series Ashita no Joe, named Danpei.

(Source: Ookami-san to Shichinin no Nakama-tachi)