Erii Yamazaki, born Yamazaki on November 20, 1997, in Chiba Prefecture, Japan, is a voice actress and singer affiliated with Horipro. Her music career began with the release of her debut album Zenbu Kimi No Seida. on November 16, 2016, marking her entry into the J-pop scene. This was followed by her single “Teenage Symphony” released on April 19, 2017, which further established her musical presence. Yamazaki's voice acting career also gained traction around this time, with notable roles in various anime and video games. Yamazaki continued to build her discography with subsequent releases such as the album Yoake No Cinderella (2018), which included popular tracks that resonated with her growing fanbase. Her single “Last Promise” (Date a Live III Ending Theme) (2019) served as the ending theme for the anime series Date A Live, further expanding her reach within the anime community. She released the single “月の秒針” on December 8, 2021, and continued to add to her catalogue with singles like “Adore me” (2023) and “Lonely Party Night” (2025). Her notable singles include “トキメキズム” released on August 9, 2023. Yamazaki's music has been well-received, with her songs often featured in popular anime series, contributing to her popularity among both music and anime enthusiasts.