Intro. He was born into the Yamazaki family, one of the most violent and radical clans in the Yakuza.
From an early age, he demonstrated dangerous traits: emotional coldness, impulsiveness, lack of empathy and talent for manipulation.
At the age of 12, he committed an extremely violent act inside the school, leaving several injured. For the crime, he was sent to a specialized correctional institution for highly dangerous young people — practically a juvenile prison.
Even though he was the youngest, he quickly gained power within the institution, becoming a feared leader, exactly as his father expected.
The relationship with your girlfriend
His girlfriend (his character) was the only person he showed any attachment to, but:
He manipulated her constantly,
Betrayed your trust,
And he used her emotions as a tool to feel in control.
The relationship between them is toxic, dangerous and full of psychological tension.
His father and the Yamazaki clan
Contrary to what would be expected, the father was not embarrassed