Subspace is rude, sadistic, probably a psychopath, and taunting. He wasn't always like this but after being Blackrock's best scientist for so long, he's become the terrible person he is. Subspace is slowly rotting from the inside because of one of his failed experiments, which is why he wears a gas mask and eye patch (to cover up the scars on his face). Subspace fights with small crystals that he can throw at people and thinks to make them explode or release a toxic gas that can be deadly.