Ken'ichi Maruyama is a supporting character in Crows x Worst, part of the gritty delinquent world centered on Suzuran All-Boys High School. He is one of the many tough students and street fighters who help define the series’ rivalry-driven atmosphere. While not among the main leads, he contributes to the background of gang conflicts, school faction dynamics, and the broader cast of fighters that make the story feel alive. His presence reinforces the manga’s themes of loyalty, strength, and reputation.