firefly_(jepella_rebellion)_(honkai:_star_rail)
An official alternate costume worn by Firefly (Honkai: Star Rail) during the events of the Jepella Rebellion.
Unlike her fellow Stellaron Hunters, her outfit isn't shown during Myriad Celestia Trailer: The Jepella Rebellion — Scene 47, due to not appearing as herself at any point during the video (she instead appears as SAM (honkai: star rail)); her outfit during the rebellion is seen during a flashback CG during the Penacony story arc.
While her skirt is canonically a long black skirt, some fan artists depict it as a pencil skirt under the assumption that she is the female figure standing above Kafka (Honkai: Star Rail) in her splash art (post #7689897).