Eri Aino is a Japanese idol and singer known primarily for her work as a singing voice provider within the Aikatsu! multimedia franchise. She is associated with the talent agency and event space DearStage in Akihabara.

Her most prominent role is providing the singing voice for several characters in the Aikatsu! series, including Kokone Kurisu, Sakura Kitaōji, Maria Himesato, and Sora Kazesawa. For Kokone Kurisu specifically, she provided the singing voice in the film Aikatsu! x PriPara THE MOVIE -Deai no Kiseki!-.

As a vocalist, Eri Aino is a member of STAR☆ANIS, a group formed to provide character songs for the Aikatsu! franchise. Within this group, she and fellow vocalist Remi Mitani were frequently featured as a duo on recordings. Unlike the speaking voice actors for Aikatsu! characters, members like Eri Aino were the dedicated singing voices behind multiple roles. As of July 2014, she was also a member of a vocal unit called Flash Fractal.

Her film credits for singing voice work include the 2014 film Gekijōban Aikatsu! and the 2015 film Aikatsu! Music Award: Minna de Shō o MoraichaimaSHOW!, as well as its 2016 sequel. These films featured her as the singing voice for characters including Sakura Kitaōji, Kokone Kurisu, and Maria Himesato.

Primarily active as a singer rather than a speaking voice actor, her contributions have been focused on live performances and recording character songs for the Aikatsu! franchise.