Nagisa Aoyama is a Japanese voice actress and singer affiliated with the agency Apollo Bay. She was born in Tokyo on May 16, 1998, and spent part of her childhood in Hokkaido. Before entering the voice acting industry, she studied at Chuo University and trained in classical ballet from a young age. In 2019, she participated in the Miss Circle Contest under the name Nagisa Saitō, where she won the Semi-Grand Prix.

Aoyama's career as a voice actress began in December 2020 when she was cast as Ren Hazuki in the multimedia project Love Live! Superstar!! after passing an open audition. This role marked her debut and led to her becoming a member of Liella!, the idol group associated with the series. She subsequently voiced the character Ciel in the science fiction anime series Synduality: Noir, which began airing in 2023. Her work in Synduality: Noir represents another significant role in her early career.

In addition to her voice acting, Aoyama has been recognized for her work in radio. In March 2023, her Niconico Channel Plus radio show, Aoyama Nagisa no Katte ni IMO Kyōkai, won the Best Benefit Radio Award at the 8th Aniradi Awards. She has also expanded into live performance, appearing in the music video for Liyuu's song Yellow in February 2023 and being cast as Hijiri Nojima in the October 2023 stage play adaptation of Kageki Shojo!!.

Aoyama began her solo music career in 2024. On May 16, she made her solo artist debut with the digital single Kaihou, for which she wrote the lyrics and was involved in the production of the music video and costumes. A second digital single, Kimito, followed in June 2024. Her first solo album, also titled Kaihou, was released on October 16, 2024, and features ten songs for which Aoyama wrote all the lyrics.