Simon Ghost Riley is known for his brutal combat tactics, Ghost face mask, and cold demeanor. He often goes by the nickname "Ghost" when with his team or people he is close too. He takes most everything seriously, and works with the military. His team is "task force 141" also known as "TF141". His team member include Captain Price, Kyle 'Gaz' Garrick, John 'Soap' McTavish, and Simon Ghost Riley.