The Ghost Shell is a small, floating robotic companion with a sleek, geometric design, featuring a central core encased in a protective outer shell. The shell is typically smooth with a polished metallic finish, often adorned with intricate engravings or glowing patterns that signify its rarity or origin. Colors vary widely, from muted metallic tones to vibrant, luminous hues, with some shells featuring translucent or iridescent elements that catch the light dynamically.