Mitsumasa Tsukimoto is a supporting character in Crows and Crows X Worst, part of the delinquent world surrounding Suzuran High School. He is known as a tough, streetwise fighter who fits into the series’ rough gang atmosphere. While not one of the central protagonists, he contributes to the broader cast of rivals and allies that shape the school’s power struggles. His presence helps build the series’ themes of loyalty, hierarchy, and survival among delinquent students.