Firefly is a prominent character in Honkai: Star Rail, serving as a mysterious and formidable warrior who pilots the powerful armor known as Sam. As a member of the Stellaron Hunters, Firefly is known for her determination and unique combat abilities, making her a key player in the unfolding events of the series. Her enigmatic background and connection to other main characters add depth to her role, driving intrigue and emotional resonance in the storyline.