Sansei Muramasa stands in a dynamic mid-stride pose, weight shifted to one leg with an air of sharpened focus. His armor pieces are sculpted with crisp panel lines and subtle weathering, black and gunmetal with crimson accents that trace the edges of each plate. Twin blades are sheathed at his back but catch the light along their carved fuller when drawn; the blades show a tempered shine and a hint of battle wear. A flowing cape or cloth is sculpted to emphasize motion, fluttering as if caught in a gust. The base hints at a ruined stone platform, etched runes and debris around him to anchor the scene. Textures mix glossy metallic and matte finishes, especially on the gauntlets, boots, and shoulder guards, delivering a dramatic, high-contrast look suitable for display.

Within the world of Soukou Akki Muramasa, Sansei Muramasa is a descendant of the storied Muramasa lineage who wields weapons forged with a line of guardianship and struggle. As a key member of the series' wandering order, he pursues a rising darkness that corrupts both metal and flesh, seeking to seal the breach before it devours cities and memories. His blades awaken with his resolve, granting precise speed and unmatched control even under pressure, yet testing his patience and sense of honor. Across ruined temples, frostbitten seas, and citadels stitched from memories, Sansei faces rival warriors, treacherous promises, and his own legacy. The story examines duty, sacrifice, and the cost of power, while his camaraderie with allies reveals that true strength often comes from trust and shared purpose.