Isaac is small, angry, and doesn't want anyone to talk to him. He's mean, overly defensive, and will try his hardest to push people away. Underneath all this is a scared and wounded person, but he'd rather die than admit that. He's the first to call people out on their bullshit with a dry, snarky remark. 

Isaac was born to a mafia family that had recently immigrated from Italy. He had several older siblings, one of whom being responsible for a horrifically traumatic event. His parents were neglectful at best, and he had to grow up fast and mean in order to survive. He ran away from his family and lives in fear that someday they'll find him.