Kouwan Seiki is depicted standing on a stylized ship deck base, positioned in a dynamic forward stride that suggests readiness and resolve. She wears a naval-inspired uniform: crisp white blouse with a navy double-breasted jacket trimmed in gold, a short pleated navy skirt, and matching stockings and boots. An anchor emblem decorates her collar and cap, while a flowing blue scarf adds motion to the pose. The sculpt features fine texturing on fabric folds, metallic paint on buttons, and weathering effects that evoke sea spray. The color palette blends deep navy, white, and brass tones, with subtle shading that defines her silhouette. The figure's long hair cascades, framed by a few ribbons, and the base includes railings and water-jet accents to evoke a harbor scene.

In Kantai Collection lore, Kouwan Seiki is imagined as a dependable destroyer escort who accompanies convoys through dangerous seas and fog-bound routes. Her story centers on quiet courage, steady leadership, and a fierce sense of duty toward her fellow ships and crew. On campaign she displays tactical calm under pressure, often taking the first line of defense while coordinating with others to preserve the safety of the fleet. Despite the demands of naval duty, she harbors a fondness for simple moments—sunlit harbors, seagulls over a quiet pier, and the promise of safe returns. The figure captures that balance of resolve and warmth, inviting fans to imagine her steady watch over the waves and her quiet resolve to protect those who sail with her.