She is known for her roles as Yua Nakajima in Hinako Note, Yumina Urnea Belfast in In Another World with My Smartphone, Mahiro Oyama in Onimai, and Silence Suzuka in Uma Musume Pretty Derby.
[7][6][8] Kouno began her career playing minor roles in anime series such as Aikatsu!, Log Horizon, and Rail Wars!.
[9] She then played the roles of Utako Uta and Pakuko in Chikasugi Idol Akae-chan, which was also the first time she performed a song in an anime.
[11] In 2017, Kouno played the roles of Yua Nakajima in Hinako Note, and Yumina Urnea Belfast in In Another World With My Smartphone.
Due to this, her scheduled activities have been limited per advice from her agency, Aoni Production, in order to prioritize her current treatment.