Ryū stands as the undefeated reigning Megalo Box champion seven years after the first Megalonia tournament. He embodies the new generation of fighters emerging after the disappearance of former champion "Gearless" Joe. Ryū trains under Yuri, the previous titleholder, forging a mentorship linking him to the sport's elite legacy.

His boxing style and professional conduct prioritize technical skill and sportsmanship. Ryū enters matches focused on proving his abilities, not settling personal grudges. After suffering defeat to Mac Rosario—a boxer who achieved a miraculous recovery through experimental technology—Ryū accepts the loss without excuses. He immediately enters rehabilitation to recover from his injuries, demonstrating resilience and dedication.

Ryū's character arc centers on maintaining composure and integrity through defeat. His reign as champion and subsequent loss to Mac highlight the intense physical and mental challenges of elite Megalo Box. The aftermath reinforces his commitment to the sport's principles, as he continues training for future competitions without dwelling on the setback.