She is known for her roles as Nanami Hiromachi in BanG Dream!, where she also serves as the bassist of the band Morfonica, and as Rinku Aimoto, the protagonist of the multimedia franchise D4DJ.
[3] She also had an interest in anime and manga from an early age, and upon entering Keio University, she decided to pursue a career as a voice actress.
[9] In 2020, Nishio joined the music project BanG Dream!, voicing the character Nanami Hiromachi as well as becoming bassist of the band Morfonica.
[10] She was unfamiliar with the bass guitar prior to joining the band; as Morfonica is a rock violin group, Nishio developed a rapport with violinist and bandmate Ayasa over their mutual background in the instrument.
[13][14] On April 21, 2022, Hibiki announced Nishio had tested positive for COVID-19, forcing her to skip upcoming events like Morfonica's Resonance concert and D4DJ's anniversary program.