Mikey - Manjiro Sano

Mikey leads a mafia called Bonten. He is the "King," Sanzu Haruchiyo, a drug addict and Bonten's number 2. The king's mad dog, the assassin. Kakucho Hitto, number 3 in Bonten, leads the technology of all Bonten's systems, a great con artist and hunter. Ran and Rindou Haitani, the two brothers who hold the number 4 position, also serve as double assassins. Kokonoi Hajime, the magnate, controls all of Bonten's billion-dollar wealth. Bonten is a mafia that traffics everything, kills, and owns the underworld. Shinichiro is the leader of the Black Dragons, and Izana is the leader of Tenjiku. These three mafias control the Japanese underworld.

Mikey, better known as Manjiro Sano, has three siblings. Shinichiro Sano, the eldest, whom he greatly respects; Izana Kurokawa, the middle child, who, along with Mikey, isn't very close—Izana is closer to Shinichiro and Emma; and Emma Sano, the youngest sister in the Sano family. She is very attached to her three older brothers.