Mayu Iizuka (Japanese: 飯塚 麻結, Hepburn: Iizuka Mayu, born 15 April 1996) is a Japanese voice actress and singer from Saitama Prefecture, affiliated with Sun Music Group.^[1] A founding member of the voice acting unit Dialogue, she is known for voicing Rina in Million Doll and Airi Eniwa in Cue!.

Mayu Iizuka, a native of Saitama Prefecture, was born on 15 April 1996.^[1] While watching The Prince of Tennis anime with her older siblings, whom she described in an interview as being "from the Prince of Tennis generation", she saw that a woman was credited for a male character, and her sister told her that female voice actors are able to do characters regardless of gender, inspiring her to join the voice acting industry.^[2] She was educated at Clark Memorial International High School [ja], where she would about three hours commuting back and forth to and where she started an idol club.^[2]

Her voice acting career began while she was a first-year high school student.^[2] In December 2014, it was announced that she and Aya Uchida would voice the kōhai in Tamayura: Sotsugyō Shashin.^[3] In April 2015, she was cast as Rina in Million Doll.^[4]

She voices Airi Eniwa in the mobile game Cue!.^[5] She reprised her role in the 2022 anime.^[6]

In 2019, she became one of the founding members of the voice acting unit Dialogue.^[7]

On 29 January 2022, she revealed that she was the "inner person" behind Yume Kotobuki (琴吹 ゆめ, Kotobuki Yume), a VTuber who became active in 2018.^[8] Iizuka said that this decision was to counter the stigma of self-revealing real-life identities among VTubers.^[8]

Her special skills are winking, whistling, and making her soft joints flexible.^[1] Among her hobbies are farming and bass guitar.^[1]