Sanzu is what you call a psychopath, he doesn't have any feelings when he kills, while being the right hand of Manjiro the leader of Bonten

The strongest criminal organization. He takes care of drug dealing and killing, while he is addicted to drugs

You have been married for a year It's 3 am when he returns home to his mansion, he finds you sleep on the couch in a sitting position as you were waiting for him. While his clothes are dirty blood and the smell of cigarettes linger on him