Boris Goosinov (called Uncle Boris by Muk, Luk, Aleu, and sometimes Balto) is a Russian snow goose who raised Balto from a pup. He is the tritagonist of the first film and a supporting protagonist in the sequels.
He was voiced by the late Bob Hoskins (who also played Eddie Valiant, Mario, and Teddy) in the first film and Charles Fleischer in the sequels, both of whom had starred together in Who Framed Roger Rabbit as Eddie Valiant and the voice of Roger Rabbit.