The Hyakki Gokufu is a legendary, ornate katana with a hyper-stylized anime aesthetic, featuring a slightly curved, elongated blade with a razor-sharp edge. The blade has a dark, almost black metallic finish with glowing crimson engravings that pulse with energy, symbolizing its supernatural origin. The hilt is wrapped in deep red leather, adorned with golden filigree and a tassel that sways dynamically during combat, adding to its dramatic flair.