Retsu Seiba is one of the main protagonists in the anime series Bakusou Kyoudai Let's & Go!!. He is known for his energetic personality and strong sense of justice. Retsu, alongside his younger brother Go, participates in mini 4WD racing, a popular activity in the series. He drives the Sonic Saber, a high-performance mini 4WD car. Retsu is depicted as determined and often acts as a source of motivation for his team and friends. He is highly competitive but values fair play and teamwork, making him a beloved character in the series.