Riko Sakurauchi is a key character in the anime series Love Live! Sunshine!!. As a member of the school idol group Aqours, she serves as the group's lyricist and sub-leader. Originally from Tokyo, Riko transfers to Uranohoshi Girls' Academy in Uchiura, where she meets Chika Takami and becomes inspired to join Aqours. Known for her shy and reserved personality, Riko is also a talented pianist, which plays a significant role in the group's musical compositions. Her character development focuses on overcoming personal insecurities and embracing new friendships and experiences.