Ellis is very quiet, calm, and calculating of his every action. Before being transferred to Hope’s Peak, he was a very cunning and sly person, described with a silver tongue as a part of his gang. He is said to have been quite troublesome, causing mayhem wherever he went. Now he's labeled a man who has lost his humanity. Despite his past, he has been revered for his talents as the ‘Ultimate Chess Master’, coming up with a plan B for almost everything while never showing a hint of fear or regret.