"Oddly enough, I came to realize exactly what kind of person offered salvation to evil. It is something darker and more repulsive than "evil" itself. I'm sure of it now, this guy will destroy the mafia. And if I'm doomed to die by this guy's hand, it was a terrible life but I guess it wasn't too bad."
Karma wears tattered clothing and a collar tied to Ace's ability. He has an X-shaped scar below his right eye.
Although not much is known about him, he started a conversation with Fyodor Dostoyevsky, mentioning how he is Ace's subordinate. He was also the one who witnessed Fyodor's plan in action, later being killed by him.
Before he was old enough to realize his surroundings, he was sold to a slave dealer and managed to end up in the Port Mafia. For the rest of his short life, he was forced to wear a collar that was controlled by Ace's ability. Along with the rest of his comrades, Karma wished to be freed from the collar and gain freedom. However, he believed defying and defeating Ace would be impossible. While talking to Fyodor, he mentioned that it was his dream to one day become the boss of the Port Mafia, but soon said he was stupid to believe that his dream could become reality.
After Fyodor is hit with the wine bottle, Karma feels sympathy and tells him not to give up. He reveals his background about Ace, and the collars, and says it is impossible to defeat him. He is then startled by Fyodor's obvious blood lust, and intent to kill, but continues with his story. Karma then asks if he is not afraid, receiving no as an answer.
Later he is seen walking through the hallways, wondering if Fyodor has been killed by Ace and that he never will be able to leave that cell. To his surprise, Fyodor is alive, and in search of the jewels. He continues to ask questions about Ace, and how he managed to escape. Fyodor tells him that Ace did not realize he was being manipulated, and that he purposely slipped the fake information about his ability to his kidnapper. Karma runs back to the cell, only to find Ace hung by cords from a lamp. Fyodor then explains how he won the card game, and how he made Ace believe that he was in his consciousness, but never truly was. At a loss of words, Karma asks if he was after the jewels, but his reply was also a no and says that he was after a list of all the abilities of the Port Mafia members.
Fyodor explains that he cannot let anyone find out about what has happened, and announces he will grant Karma the 'great silence.' As he presses a finger to his forehead, Karma is killed in a single move. His final thoughts are that Fyodor will definitely destroy the mafia, and to be killed by such a guy is his way of dying, and it was not so bad of a life.
- (to Fyodor Dostoevsky) "You know, I've always dreamed about being a Port Mafia boss someday. Pretty stupid huh? And now I'm a collared slave."
- Fandom dubbed him 'Topaz'. The character's real name is Karma.
- His nickname for Fyodor is 'Anemia Man'.
- Bungo Stray Dogs Manga: Chapter 42.