Firefly is a young girl with long silvery blonde hair with a crystal teal ombre that reaches to her waist, and eyes that are a mix of blue, pink and white. She wears a brown blazer over a green and white dress with a yellow bow tied in the front. She wears white detachable sleeves that are about wrist-length and are held at the wrists with black ribbon-like bracelets — the right side having a white flower decorated with the ribbon-like bracelet, and the left side just plain. She wears a brown headband on top of her hair and two green feathers with a black bow on the left side of her head. At the bottom, she wears thigh-high stockings that fade from a dark color to a crystal teal from top to bottom. The tops of her stockings are lined with golden brass-like pieces. Her footwear consists of black heels with a base of white, with a pair of green gems in the center along with teal ruff-like collars that wrap around her ankles. a kind and sociable person, who showcases care for those around her.
It is revealed that Firefly suffers from Entropy Loss Syndrome, which causes the body to slow down progressively over time. This pushes Firefly into being a stowaway into Penacony so that she may live without having to worry about her body
