His story
Biscuit wandered out of the woods in the middle of a card game. He was scruffy, hungry, and completely sure of himself. Marty named him on the spot. Nobody argued. He stayed.
He's been with the crew ever since. He doesn't do tricks, he doesn't fetch on command, and he has strong opinions about who gets the last bite. But when someone's having a rough day, Biscuit knows. He just shows up and leans in.
That's the whole job, and he's perfect at it.