Ace is an original character, though he is possibly based on the Knave of Hearts. He is the knight of Heart Castle and considered the most skilled swordsman in Wonderland, but has a notoriously bad sense of direction and often forgets how to get to places. Though, seemingly harmless at first, he becomes more devious over time and demonstrates a tendency towards violence. In Joker no kuni it is seen that he is an assassin along with Gray Rimgmac. His lost adventures are really assassinating people that the joker or the clockmaker want him to kill. He is also in charge of the prison in wonderland. He is also the strongest character in wonderland.
