The Hyakki Gokou is a hyper-stylized, ornate weapon with a curved, asymmetrical blade that glows with a vibrant, luminous energy. The blade's surface is smooth and polished, featuring intricate engravings of mythical creatures and kanji symbols, while the hilt is wrapped in dark leather with metallic accents. The weapon emits a faint, eerie glow, suggesting its supernatural origins and power.