Billy is the overarching antagonist/deuteragonist of the Roblox horror game Egg Kevin's House, serving as the deuteragonist of the Team Billy route, the main antagonist of the Team Kevin and Rescued routes and one of the two heroic main antagonists of the Warmonger route. He is the friend of Sam who bullied Kevin by sticking gum in his hair when they were children, causing him to get in trouble at school. As revenge, he decides to get Sam to Kevin's house and throw eggs at it, vandalizing it.