Ace

Ace (エース,) is a former Port Mafia Executive that captured Fyodor Dostoevsky. He is the first victim of Dostoevsky's newest scheme.

Appearance
Ace is a young man with short, light straight hair, but bangs parting in the middle of his face. A part of his hair covers his right eye.

Like most of the mafia, he dresses formally. Being a gambler, he dresses in a gray suit vest and a purple tailcoat. He also wears purple slocks and gloves. He also wears vertical bar earrings.

Personality
Though he is an Executive, he has no loyalty towards the Port Mafia and even tried to recruit Fyodor in his attempt to rebel against the mafia. He is shown to be a very cocky person.

Despite his arrogance, Ace is intelligent and observant. He notices the inconsistencies of his base since Fyodor's arrival, from the door lock to the frozen clock. Having his intelligence underestimated greatly insults Ace, and he is prone to violence as a result.

Ability
Ace's ability, Madness of the Jewel King (宝石王の乱心,), is an ability that turns his subordinates' life (those who equip the collar he gave) into jewels which worth according to the target's lifespan.

Background
Ace started as an astute, clever gambler that dominated one of the Port Mafia's casinos. He bribed authorities a great deal of money, quickly rising to the rank of Executive within the mafia. However, he is internally recognized by the mafia as nothing more than a bodyguard rank.

The Guild Aftermath Arc
Ace appears reporting the capture of the Fall of Moby Dick's mastermind, Fyodor Dostoyevsky, to Ōgai Mori and Kōyō Ozaki. He describes the man as a "soulless, vampire-like man", but keeps his thoughts to himself rather than further elaborate to Mori.

Mori suggests leaving Dostoyevsky to Kōyō and her torture squad, but Ace insists to take care of him himself. This surprises Kōyō, who points out the majority of the Executives stayed out of the war against The Guild. Ace retorts by suggesting it's better than being the first of the Port Mafia to be captured during the war, greatly antagonizing Kōyō. Before their debate goes any further, Mori abides, leaving Dostoyevsky in Ace's hands, much to Ace's pleasure.

Kōyō questions Mori's decision, given Ace's disloyalty and deceptions against the Port Mafia for his own financial gain. Mori, however, counters that financial gain is Ace's strong suit, so they should wait and see what Ace has up his sleeve.

In the depths of the mafia's HQ, Ace greets Dostoyevsky and introduces himself. Taking a knife, he cuts off the restraints, ridiculing his subordinates for treating a "guest" in such a way, ordering drinks and clothing for Dostoyevsky.

After Dostoyevsky is dressed, Ace claims to be a lonely man. The mafia distrusts him, and he distrusts the mafia. The only thing he trusts is his games of chance, the jewels in his vault, and his private force fifty men. He refers to the man as the "51st" person he can trust and invites Dostoyevsky to join forces with him in killing Mori.

Dostoyevsky does not agree, instead of threatening to kill Ace. Ace snaps, breaking a bottle on Dostoyevsky's head. Clenching his fist, Ace demonstrates his ability. One of his subordinates suddenly falls to his knees in pain, and Ace's turns him into an array of jewels. He claims it's an ability overflowing with benevolence. The collars his subordinates wear, Ace explains, are put on of the subordinate's own agreement, but cannot be taken off. He orders his remaining subordinates to clean Dostoevsky up and claims that if he agrees to put a collar on, A won't kill him. He then leaves the room for some time.

When Ace returns, Dostoyevsky suggests they play a game. Dostoyevsky is confident Ace cannot kill him because Ace wants information on his group's next move and finances, logic A understands.

Ace decides the rules of the games: Dostoyevsky draws first, guessing the card to below correctly, and the card after that as well. Both times Ace counts only as luck. However, Dostoyevsky continuously guesses correctly and ends up with all the cards, Ace never having a turn whatsoever. Throwing a fit, Ace orders for Dostoyevsky to have his "swindler limbs" cut off.
 * 1) Take one playing card at a time from the same deck.
 * 2) Guess if the card will be lower or higher than the previous card.
 * 3) If the guess is correct, the guesser goes again. If incorrect, the other player draws.
 * 4) When all cards are drawn, the player with the most cards wins.
 * 5) If Ace wins, Dostoyevsky leaks information. If Dostoyevsky wins, Ace grants him his freedom.

This proves impossible. Dostoyevsky initiated the game, antagonizing Ace the whole way, to stall for time, and now the Rats in the House of the Dead run the underground base. Dostoyevsky bargains that if Ace hands over the jewel vault's key, he will survive. Ace, undeterred, reveals that his base isn't on mafia territory, nor is it truly underground. In fact, he claims it to be on a ship at sea. Apparently, its equipment was used during an ability users' war, presumably the one eleven years ago. Thus, suppression of its current group would be impossible without an uproar.

Ace reveals he wiretapped Dostoyevsky's conversation with the boy, and knows Dostoyevsky can lock his enemy's consciousness inside his own head, hence why he was so lucky in the card game. His proof being the lack of uproar on the ship that he should have heard, the door not opening whatsoever, and the clock, which hasn't worked since Ace returned.

Ace brags about overcoming Dostoyevsky's ability, calling himself a "king by birth" thanks to knowing all there is to know about Dostoyevsky. With great pride, he reveals he knows how to free himself of Dostoyevsky's ability: 'killing' himself in the man's mind and waking up alive in the real world to kill Dostoyevsky. He takes the wire off a lamp and hangs himself with it.

Instead, Dostoyevsky leaves the room of his own volition, revealing to the shocked boy he tampered with the room all along, and that his ability is not locking a person's consciousness in his own. Ultimately, this means Ace hung himself and died for nothing.

Appearances
{{Appearance
 * Chapters =

The Guild Aftermath Arc

 * Chapter 42 - Sins Granted by the Hand of God
 * Episodes=

The Guild Aftermath Arc
}}
 * Episode 29 - My Ill Deeds Are the Work of God

Trivia

 * Madness of the Jewel King refers to Ace himself, however, it is likely the title comes from the play The Madness of King George III, a play by Alan Bennett. Likely to avoid copyright complications, Ace's ambiguous name, and ability name focus strongly on the character, rather than the author.