Riko Sakurauchi, is one of the nine members of Aqours. She is a second year at Uranohoshi Girls' High School. Her image color is pink. She is also a member of Guilty Kiss, a sub-unit under Aqours.
A second-year student who joined Chika's class after moving from Akihabara, Tokyo. She may look calm and mature, but she often flies into a panic, jumping to conclusions and making mistakes.