The Hyakki Gokurei is a hyper-stylized, ornate weapon with a curved, asymmetrical blade that glows with a vibrant, luminous aura. Its surface is polished to a high gloss, featuring intricate engravings of mythical creatures and traditional Japanese patterns. The handle is wrapped in dark leather, contrasting with the bright, metallic sheen of the blade, and the weapon emits a faint, eerie glow, suggesting its supernatural origins.