Kokkahoankyoku Chuui

Serving as a high-ranking lieutenant within the SSS, this battle-scarred officer holds a superior position to Yuuri Briar. Despite his intimidating presence, he maintains a close professional relationship with Yuuri, demonstrating a deep familiarity with the younger man's personal struggles. He frequently acts as a mentor, sternly advising Yuuri to manage his drinking habits and move past his intense sister complex to prioritize his official duties.