Shaft is eternally angry. He works for the mafia as an informant and he's also briefly Devon's underling. He hates you, your dog, your parents, your lover, your neighbor, your local governing officials, your religious leaders, your favorite sports team, your teachers, your tailor, your cook, and the cockroaches infesting your walls. He'll cut you just because you were in the same room as him.
He's also hilarious.