Lucia Fex is a supporting character in the animated film Promare. She is the daughter of Ignis Fex, the captain of the elite firefighting squad Burning Rescue, and serves as the team’s chief mechanic and engineer. Lucia is a young woman with a small stature, blonde hair often worn up, and green or cyan eyes. She is responsible for the development, construction, and maintenance of all of Burning Rescue’s equipment, including the specialized Matoi Tech gear used by the main protagonist Galo Thymos. She is also the operator of the team’s largest vehicle, the Mega Max. Lucia possesses a brilliant technical mind and a quirky, eccentric personality. She is often seen tinkering with gadgets, eating snacks while working, and approaching her duties with a calm, focused demeanor that belies her unusual appearance. Her primary motivation is the smooth operation and continuous improvement of her team’s tools, reflecting a deep dedication to her craft and to the safety of her colleagues. Despite her offbeat nature, she is a reliable and essential member of Burning Rescue, providing the technological support needed to confront the Burnish-fueled fires that threaten Promepolis. Her key relationship is with Galo, for whom she builds and customizes his signature Matoi weapon and gear, working closely with him to optimize his combat performance. She also maintains a close bond with her father, Ignis, and frequently has a pet rat named Vinny in her company. Over the course of the story, Lucia undergoes no major personal transformation but remains a constant source of technical expertise, eventually modifying the team’s equipment for the final battle against the antagonist Kray Foresight. Her notable abilities include advanced mechanical engineering, inventiveness, and the practical application of firefighting technology. She dislikes being called a mad scientist, preferring to be recognized simply as a competent engineer.