Suomi Kivinen is a character from the mobile game and anime series Doll's Frontline. She is a Tactical Doll, also known as a 'T-Doll', which are androids used in combat scenarios. Suomi is based on the Suomi KP/-31 submachine gun, reflecting her Finnish heritage and specialty in close-quarters combat. Known for her reliability and fierce loyalty, she often takes on a supportive role in her squad, providing essential firepower and strategic support. Her character design embodies the blend of military efficiency and the unique charm characteristic of the series.