Riko Matsumoto is a supporting character from the anime series 'Girls und Panzer.' She is a student at Ooarai Girls High School and a member of the Anglerfish Team. As part of the tank crew, Riko contributes to the tactical operations during Sensha-dō matches. Though not a main character, she is known for her calm demeanor and reliable nature, providing steady support to her teammates. Her role highlights the teamwork and friendship that are central themes in the series.