The Hyakki Gokoku is a hyper-stylized, ornate shield with a circular base, featuring intricate engravings of mythical creatures and symbols that glow with a faint luminous blue when activated. Its surface is a combination of polished metal with a glossy finish and weathered edges, suggesting ancient origins and battles fought. The shield's design is asymmetrical, with a prominent central crest that resembles a demonic face, adding to its intimidating presence in combat.