The main or "default" character in The Binding of Issac. One of Issacs main gimmicks is his D6, allowing him to reroll an item into something else, leaving it to chance that the item is of better or worse quality. Issac is depicted as naked, due to the intro story of Issac's mother listening to a voice telling her to take away everything that could "corrupt" Issac and she takes everything from his crayons and drawings to his clothes.