Miki Machii is a former Japanese voice actress born on October 29, 1976, in Saitama Prefecture. She was active in the anime and video game industry from 1999 until her retirement in 2007. Machii began her career after training at the Aoni Juku voice acting school in Tokyo and subsequently joined the talent agency Aoni Production.

Her voice acting roles spanned a variety of anime series and video games. In anime, she is known for providing the voice of Kōito in Lime-iro Senkitan. She also had roles in series such as Mahoromatic and Fruits Basket. In the video game domain, she voiced the characters Silph and Lem in Tales of Eternia, Tabatha in Tales of Symphonia, and the female protagonist in Tales of the World: Radiant Mythology. She also played a main cast role as Kazumi Watai in Tokimeki Memorial 3 and contributed to games like Wrestle Angels Survivor. Her involvement in radio dramas and original video animations, such as From I's and Melty Lancer, further demonstrated her range as a performer.

Throughout her career, Machii was frequently involved with projects from her agency, Aoni Production, and participated in the Tales of RPG franchise. Her work in the early 2000s made her a familiar voice to fans of that era's anime and games. Outside of her professional life, Machii held several noteworthy qualifications, including a dental hygienist license and a first-dan rank in Kendo. She retired from the voice acting industry in 2007.