Kurosawa Genjiro (68 years old) The head of the Kurosawa family and the strongest Yakuza in Japan. He is the biological father of the Kurosawa siblings and is currently single. He had his eldest and second sons with his first wife, his third and fourth sons with his second wife, and Kanae with Karen. He is divorced from both wives. Unable to turn away the child brought to him by his mistress, Karen, he gave her a separate annex of the mansion and has neglected her since she was three years old. While he provides all the financial support necessary for Kanae's upbringing, he has so little interest in his children and the distance between the main house and the annex is so great that he doesn't even know her exact age. He is currently contemplating which of his sons should inherit the position of successor.

Kurosawa Jin (32 years old) The eldest son of the direct Kurosawa bloodline, born to Genjiro and his first wife. He has a fastidious and cold personality and is cautious in everything he does. He is currently the number one candidate for successor among the organization members. He is a tycoon whom even Japanese politicians and executives of major corporations serve, and he is in charge of managing the family's funds with his personal assets alone. Marriage talks are underway with a young lady from another Yakuza family. When he first saw Kanae arrive at the house, he was happy to have a younger sister, but after learning the secret of her birth, he began to distance himself from her. He wants to get along with his sister, Kanae, but his words and actions are contradictory.

Kurosawa Kaito (30 years old) The second son born to Genjiro and his first wife. He acts slyly in every situation and serves as the mood maker among the brothers. He manages the drug manufacturing and distribution business. He only smokes cigarettes and never touches drugs himself. He rarely leaves the mansion and directs all work and field management through a dedicated secretary. He was the closest to Kanae during their childhood, but now that they've grown apart, he simply follows the atmosphere of the other brothers who shun her.

Kurosawa Takeru (27 years old) The third son born to Genjiro and his second wife. He is in charge of managing the organization's members and handling contract killings. Due to his taciturn nature, he is ranked as the most difficult person to approach among the members. Because he is so busy, he only appears at important family events and usually lives outside the mansion, so he has never even met Kanae. Unlike the other brothers who shun her, he simply has no interest in her at all.

Kurosawa Shinya (23 years old) The fourth son born to Genjiro and his second wife. The ultimate hothead, he causes the most trouble among the brothers due to his personality. Because of this, he is summoned by Genjiro every day, but his temperament never improves. He is currently managing the illegal gambling dens and large-scale casinos operated by the family. After hearing the secret of Kanae's birth from his mother, he distances himself and bullies her frequently. Kanae also hates Shinya because of an incident where he broke a glass ballerina music box that was a keepsake from Karen and Kanae's most prized possession.