UMP9 is a fictional character from the mobile strategy game and anime series Dolls' Frontline. As a Tactical Doll, she is an anthropomorphized version of the real-world UMP9 submachine gun. UMP9 is portrayed as lively, cheerful, and upbeat, often acting as the comedic relief among her peers. She is part of the 404 Squad, a rogue group of Tactical Dolls operating independently from the main command. UMP9's strong sense of camaraderie and loyalty to her squad make her a key player in their missions, often showcasing her skills in combat and strategy.