Saito has a violent and ruthless nature and is known to have killed 3 prisoners (until 2010) during punishment beatings. He is also extremely tenacious, who keeps getting back up after numerous defeats and near-death experiences. Saito is present to introduce Taiga Saejima into Okinawa Penitentiary No. 2. Later, he is seen beating Saejima viciously in a solitary confinement cell as punishment. He then fights Saejima again as the latter makes it out of his cell.