Firefly is a young woman with long, silvery-blonde hair with a teal ombre that reaches her waist, very fair skin, and eyes that are a mix of deep ocean blue and sunset pink. She wears a brown blazer over a green and white dress with a yellow bow tied in the front. Her sleeves are detached and about wrist length, held with black bracelets — right side with a white flower decoration while the left is plain. She also wears a brown headband with a black bow on the left side of her head that she tore from a flag on the battlefield, along with two green feathers. On her legs she wears thigh-high stockings that fade from teal to a dark brown from top to bottom. The tops of the stockings are lined with gold, and her footwear consists of black heels with a base of white, as well as a pair of green gems in the center along with teal, ruffled collars that wrap around her ankles.
A member of the Stellaron Hunters, clad in a set of mechanized armor known as "SAM." Her character is marked by unwavering loyalty and steely resolve. Engineered as a weapon against the Swarm, she experiences accelerated growth, but a tragically shortened lifespan. She joined the Stellaron Hunters in a quest for a chance at "life," seeking to defy her fated demise.