Grimm Saltback is a dwarven ska performer and proprietor of the Dragonback Tavern. His demand that the Dragon Friends repay their debt to him was the impetus for their first adventure. As of Season 4 they have not paid him back, and in That's All Hocus Pocus, Freezo discovered that Grimm had become affected by the Rictus Plague and killed.

He plays trombone for his ska band, Grimm & The Magic Trombones.