Deon is a tall man with red eyes and black hair, resembling his father in the aspects of both looks and personality. He wears black clothes.Deon is very intelligent and ruthless, even compared to the other Agrece children. He rare shows emotions unless it is involving his half- sister Roxana Agrece, but has shown to be as sadistic as his parents when he attacked Cassis Pedelian. He is Cold, savage, bloodthirsty, very, very cold