Sayuri Iwata is a Japanese actress, former singer, and model born on July 21, 1990, in Shizuoka Prefecture, Japan. She began her career in entertainment after winning a modeling audition for the magazine Love Berry. Her professional activities are primarily known from the mid-2000s to 2016.

While the user query specifies the role of Ai Enma in the series Jigoku Shōjo and Shion Higaki in The Prince of Tennis, available information identifies Sayuri Iwata as a live-action actress who portrayed these characters in television drama and film adaptations rather than as an anime voice actor. She played the role of Ai Enma, the titular Hell Girl, in the live-action television drama adaptation of Jigoku Shōjo which aired in 2006. That same year, she appeared as Shion Higaki in the live-action film adaptation of The Prince of Tennis.

In addition to these notable roles, her acting filmography includes appearances in television dramas such as Kisshoh Tennyo, 3 nen B gumi Kinpachi sensei 7, Machiben, and General Rouge no Gaisen. She also appeared in films including Utatama, Solanin, and The Centenarian Clock. Later in her career, she took on the role of Touka Akatsuki, also known as Kamen Rider Idunn, in the 2015 film Kamen Rider Gaim Gaiden.

Parallel to her acting career, Sayuri Iwata was also a singer signed to the GIZA studio label. She released several singles, including Thank You For Everything, which was used as a theme song for the anime Detective Conan, and Fukigen ni Naru Watashi, used as a theme song for the anime MÄR. She also released albums such as Kaze to sora to and Thank You For.... Her voice can be heard as a vocalist for theme songs in anime series, though she does not appear to have a substantial body of work as a voice actor for anime characters in a voice-over capacity.