Тацуя Сирогами

Tatsuya was the Nidaime (second generation kumicho ) of Kuryugumi, and Ryuuji's father. After he is killed by Odawara, an associate, Ryuuji succeeds the kumicho position as Sandaime at only 14 years old. Notorious for his emotionless face, Tatsuya is also regarded as cold and fearsome in the world of the yakuza. However, he shows affection in many small ways: taking Kaya under his protection after her sister is killed, and asking Kamojima to raise the infant Ryuuji and send him photos of him. Despite not feeling close to him, Ryuuji is still shaken up by his death.