Honkai: Star Rail's Penacony arc introduced a number of compelling characters, and one that intrigued many players was Firefly. First introduced as a stowaway in the Dreamscape in Honkai: Star Rail Version 2.0, this young girl serves as the Trailblazer's tour guide at the start of their journey in the Land of the Dreams. Despite her timid demeanor, she later proved to be a valuable piece in the mission to uncover Penacony's dark secrets.