Deon is very intelligent and ruthless, even compared to the other Agriche children. He rarely shows emotions unless it is involving his half-sister Roxana Agriche, but has shown to be as sadistic as his parents when he attacked Cassis Pedelian. Dion is Lant and Maria's child. Like all children of the Agriche, he went through the same education. He is responsible of the death of Achille Agriche.