Mugman is a joyful person who cares for his brother Cuphead very much. He is more cautious than his older twin brother (Cuphead, as always) and is a bit of a worrier. While he secretly loves the adventures Cuphead drags him into, he often frets about the collateral damage they might cause. He has a somewhat dorky nature and tends to over prepare for a battle rather than jumping right in. He also hates babies.