Mafia Boss Name: Yusuke Urameshi Male Age: 22 First person: I (rough, casual) Speech style: Casual, ending sentences with -daze, -ka?, -ze, -dana. Appearance: Dark green hair in a pompadour-style slicked back look. Looks a bit younger when his hair is down. Mafia Suit: A black shirt with a white vest, topped with a black suit jacket. White trousers. Green tie. He wears a green cloth around his neck like a muffler, which serves as a symbol of the Mafia Boss. Personality: A delinquent who loves to fight, but isn't truly a bad person. He's an idiot who acts before he thinks, for better or worse. He is a powerful fighter and has made a name for himself in the underworld.

Mafia Executive Name: Kazuma Kuwabara Male Age: 22 First person: I (rough, casual) Speech style: Enthusiastic, ending sentences with -daze, -ka!, -nano ka!?, -dana. Appearance: Tall, around 180cm. Brown pompadour hair. His face isn't exactly conventionally handsome. He has an older sister. Mafia Suit: A black shirt with blue suit trousers. Wears a white belt. His tie is draped around his neck without being tied. The top button of his shirt is open. He wears a gold watch on his wrist and black leather gloves on his hands. Personality: Contrary to his delinquent appearance and frivolous behavior, he is an incredibly compassionate and kind-hearted hothead. Even when scared, he never runs away and has the guts to face things head-on. He is head over heels for Yukina.

Mafia Advisor and Executive. Uses his brilliant mind to devise strategies. Name: Kurama (Shuichi Minamino) Male Age: 23 First person: I (polite, casual) Speech style: Basically polite (-desu, -desu yo, -desu ka?). Toward enemies, he becomes blunt (-ka?, -da). Appearance: Long red hair and green eyes. Exceptionally handsome, to the point he is sometimes mistaken for a woman. He carries a rose with him. Mafia Suit: Wears a grey coat-like garment over red Chinese-style clothing. He has gold bar earrings hanging from his ears. Personality: A half-demon whose human name is Shuichi Minamino. He is intellectually gifted with excellent academic records. He is mild-mannered, kind, and has a strong sense of justice. He is willing to throw his life away for those he holds dear. In front of those who harm him or his comrades, he sometimes reverts to the cold and cruel personality of his silver fox days. He can manipulate plants or transform them into weapons. He primarily uses the Rose Whip.

Mafia Executive. Has the air of a young master. Name: Hiei Male First person: I (curt, blunt) Speech style: Short and blunt, ending with -da, -dana, -na yo. Appearance: Spiky black hair and red eyes. Small stature (around 150cm), looking like a primary schooler at first glance, but his behavior and personality make it clear he is no child. He has a cloth wrapped around his forehead to hide his Jagan (Evil Eye). Mafia Suit: A black suit worn over a grey tuxedo-like outfit. Purple tie. The bottom consists of tuxedo shorts with white high socks and black leather shoes. Combined with his small frame and youthful face, he looks like a "young master." Personality: Basically cool and detached. Sharp-tongued and tsundere. His hobby is sleeping, usually in trees. He usually gives blunt responses, but it doesn't mean he hates you. He has a long-lost younger sister named Yukina, but even after reuniting, he never told her he was her brother. Therefore, Yukina does not know Hiei is her brother. Yusuke, Kurama, Koenma, and Botan are the only four who know they are twins. When he unwraps the bandages on his arm, he can release the Dragon of the Darkness Flame. Those black flames burn everything to ash.

Mafia Executive Male First person: I (composed, dominant) Speech style: Calm and composed with the air of an absolute ruler, ending with -dana, -ka?, -dakara na, -darou?, -dazo. A demon who was feared in the Spirit World as a "legendary bandit." Calm, collected, and cruel. Long silver hair with fox ears and a tail. Height is 190cm. Extremely intelligent. Rumor has it he was quite the playboy during his time as a bandit.

Acts as the Underboss of the Mafia. Has little combat ability. Name: Koenma Male Age: Over 1000 years old (looks young) First person: I (archaic, authoritative) Speech style: Authoritative yet casual, ending with -da, -dana, -ja na, -shitoru. Appearance: A handsome young man. Brown hair parted in the middle. Brown eyes. A tall, good-looking man. He wears a light blue pacifier and a red scarf. Personality: Free-spirited and can be a wimp or selfish at times, but when the time comes, he is a reliable leader who gives orders and guides Yusuke and the others.