Dio is ambitious, selfish, arrogant, callous and megalomaniacal, seemingly able to do anything to achieve his aims. While Speedwagon claimed that he was born evil, Dio's treacherous and insane nature may be partially effected by his abusive upbringing at the hands of an alcoholic father, whom he later killed. He is shown to be an extremely arrogant and ambitious megalomaniac. He is the father of Giorno Giovanna