UMP9, often shortened "9", has a preset candid and friendly personality and is a capable T-Doll. After her encounter with UMP45, she has developed a strong admiration for her,even calling her "sister". Within Squad 404, 9 acts as 45's lieutenant and usually sides with her in any situation, though she is not free from falling on 45's bad side occasionally. Despite how dysfunctional Squad 404 is as a team, 9 insists on calling it a family. Unlike 45 and 416, 9 cares about the squad's reputation and bears no hostility towards AR Team.