Darkos, son of Maltazard, is the second-in-command of Necropolis, the capital of the Seides' realm. He is most likely born after his father had been seduced by a weevil when he was drunk. He was soon proved to be a skilled fighter, although very slow-witted.
Darkos first appears at Max's bar when Arthur, Selenia and Betameche stops over. He then summons dozens of Seides to him and tries to capture the trio, but fails in doing so. He later catches Arthur and Betameche discussing about Arthur's marriange.
Later when Arthur destroys Necropolis using his new ball, Malthazar, his father, abandons him, leaving him to drown. What happens next is unknown, but it is certain that Darkos somehow survived the flood.