Pom-Pom is the adorable conductor of the Astral Express in Honkai: Star Rail. Resembling a rabbit-like creature, Pom-Pom manages the train's operations, greets passengers, and ensures smooth travels across the stars. Despite their small size, they take their duties very seriously, often scolding the Trailblazer for littering or tardiness. Pom-Pom serves as a non-playable character and the player's avatar in menus. They have a quirky personality, loving cleanliness and punctuality while harboring a fondness for collecting trash as souvenirs. Throughout the story, Pom-Pom provides comic relief and heartfelt moments, becoming a beloved mascot of the Astral Express crew.