Ran and Rindo

Despite being a fist fighter as a child, Ran often resorts to underhanded tactics in combat, using a club or any other weapon that can cause injury and ensure victory.[9][10] Ran is known to never fight fairly, and justifies this stealthy approach as a means to defeat much stronger opponents.

Rindō remains proud of what he and his brother are capable of, as they are widely known for their authority and fighting capabilities as a duo.[6] However, his arrogance in displaying this confidence was later shown to be the cause of his reckless decision-making, which lost him at least a fight against a much stronger opponent.
Combat Skills: Rindō has proven himself to be an expert in wrestling, his signature fighting tactic being to lock his opponents' joints and break their limbs, and sometimes using his fists.
Personality: Rindou has a sadistic nature, enjoys fighting, and has no problem inflicting injuries of any severity. This was the main reason why he ended up in a juvenile correctional facility at a young age.
Authority: Rindou has a respected reputation among Tokyo's criminals, having led countless gangs in the past. He ruled the Roppongi district after defeating Tokyo's once largest biker gang, the Max Maniacs, and was one of the leaders of the Sky, Rokuhara Tandai, and Swastika Kanto, which later led him to a leadership position in the Bonten crime organization.
Personality: Ran is capricious by nature towards others, which makes him mysterious. He is also independent in himself and only respects his younger brother. During fights, he is very violent and sometimes resorts to tactics that involve using weapons, such as a metal club or bricks. Ran cares for his younger brother very much: he gets very worried and angry when he sees him get hurt, and often cheers him on during their fights together.