Prime Minister Shiramizu possesses a sharp, formal appearance, with fair skin, swept-back black hair, and rectangular glasses framing his stern gaze. His attire—a crisp navy blue suit, light gray dress shirt, gray tie, and matching pants and shoes—projects bureaucratic precision, accented by a distinctive yellow lapel pin consistently fastened to his jacket.

He exudes authority through measured speech and steely composure, prioritizing political pragmatism with unwavering resolve. His deep-seated distrust of Beastmen drives policies favoring containment over autonomy, exemplified by his transactional alliance with Anima City’s mayor, Barbara Rose. Though instrumental in establishing the city as a Beastmen enclave, his intent remains rooted in control, not liberation. During its 10th-anniversary celebrations, he openly threatened violent intervention should Beastmen destabilize order, underscoring his readiness to enforce compliance through oppression.

Shiramizu’s interactions with Rose blend cooperation with tension, reflecting his rigid belief in governance through power. Their partnership, while productive, remains a strategic maneuver to balance containment with political expediency, revealing a leader who values control above all else.