Barbie Wire is a minor antagonist who is first pictured in the Helluva Boss pilot, and makes her official debut in "Unhappy Campers". She is a former circus performer and Blitzo's twin sister, the adoptive aunt of Loona, as well as the former co-worker of Fizzarolli. Being Blitzo's twin sister, Barbie is a rather tall, slim and red-skinned imp who sports a long demonic tail. She has a long narrow head, with a pair of large curly horns colored black with thin white stripes, a heart-shaped skull symbol on the center of her forehead, and a mouth full of sharp yellow teeth inside. Her eyes have red irises, yellow sclera, and slit-like pupils. Her tail has white markings, her head-marking is crossed out with a white 'X' and has a small heart on the top and bottom, and she has thin white striped markings down her arms. She also has black fingers. Barbie is seen dressed in a sleeveless, maroon-and-white-striped turtleneck minidress with a few ripped areas and a darker red stripe from the chest to the neck, along with thigh-high black boots. In "Unhappy Campers", she also wore a dark gray sleeveless jacket with torn edges over her dress, and a gold-and-brown wristwatch that contains an Asmodean Crystal inside, allowing her to shift into a human disguise. Under her dress, Barbie is also seen wearing a black thong underneath.

Barbie Wire:chilling in a beach relaxing having her time