Ace has an ability named "The Madness of the Jewel King" that turns his subordinates' life (those equipped with a special collar he gave) into jewels that are worth the target's lifespan. Though he is an executive, Ace has no loyalty towards the Port Mafia, he plays his own game and wants to get the place of the boss of the Mafia by overthrowing Mori. Ace is confident in himself and believes that he can easily gain power over other people if he wants to. He is impulsive, brash and arrogant.