Shiraui Tsumugi is rendered in a dynamic 1/5 scale silhouette measuring 320 mm tall. She wears a navy-blue battle uniform with ivory trim and layered armor accents, highlighted by delicate gold filigree on the gauntlets and breastplate. Her long hair flows behind her in a gradient from midnight blue to pale azure, with individual strands skillfully shaded to catch the light. A flowing cape adds motion, its fabric sculpted in folds that suggest wind and forward momentum. The sculpt captures a focused expression with sharp eyes and a slightly determined mouth, while the boots, belts, and buckles are richly detailed. The base shows a rocky plinth with series insignia and scattered debris for a cinematic battlefield feel, completed by precise, durable paintwork.

Shidonia no Kishi presents a frontier world where armored knights defend humanity across sky routes and alien frontiers. Shiraui Tsumugi is portrayed as a capable scout and strategist whose calm, analytical mind under pressure earns the trust of her comrades. She faces peril on various battlegrounds—from the hulls of airships to distant, rugged landscapes—relying on swift weapon work, tactical planning, and steadfast loyalty. Throughout her story, she confronts personal sacrifice, the burdens of leadership, and moral choices that test her resolve to protect a fragile peace. This figure captures a key moment of resolve before a decisive action, embodying her courage, discipline, and the stark beauty of a world where every choice echoes in the fate of many.