Mayu Iizuka is a Japanese voice actress and singer born on April 15, 1996, in Saitama Prefecture. She is affiliated with the talent agency Sun Music Group. Her interest in voice acting was sparked during her childhood while watching the anime The Prince of Tennis with her siblings; learning that female voice actors could perform roles for male characters inspired her to pursue this career path. She began her voice acting activities while in her first year of high school.

Iizuka's career encompasses a range of roles in anime, video games, and film. In anime television, her notable roles include Rina in Million Doll, Kawauchi-san in Recorder and Randsell, Kumarin in Gon, and Akane Niimura in Sakura Trick. She also voiced Mizuki Nishimura in And You Thought There Is Never a Girl Online? and had early roles in series such as From the New World and Freezing Vibration. A significant leading role came in 2022 when she voiced Airi Eniwa in the television anime adaptation of Cue!, a role she originated in the mobile game of the same name. In film, she voiced Suzune Maekawa in the Tamayura: Sotsugyō Shashin film series. Her work in video games includes the角色 Nanase in Under Night In-Birth, a role for which she was cast early in her career while still in high school.

Beyond acting, Iizuka is also known for her musical career. In 2019, she became a founding member of the voice acting unit Dialogue, an idol group signed to Pony Canyon. She has performed theme songs for series including Million Doll and Kubo Won't Let Me Be Invisible. In a unique跨界 move, it was revealed in 2022 that she was the "inner person" behind the VTuber Yume Kotobuki, having been active in that virtual capacity since 2018. Her stated hobbies include farming and playing the bass guitar, and her special skills are winking, whistling, and having flexible joints.