Miwa Kouzuki is a Japanese actress and voice actress born on March 6, 1975, in Nagano Prefecture, Japan. She is affiliated with the talent agency 81 Produce. Her career, which began in the late 1990s, has spanned work in anime television series, original video animations, and video games.

Kouzuki made her voice acting debut in 1998, taking on minor roles in productions such as the television anime Good Boy. In the early 2000s, she became active in the adult game market under various aliases, including Haruno Hiyori. However, she transitioned away from this sector of the industry around 2002 to focus on general audience animation and film work. Her early prominent roles included voicing Tomomi Aizawa in the film Pia Carrot e Yōkoso!! - Sayaka no Koi Monogatari and Shigaraki Miako in the OVA With You ~Mitsumeteitai~.

Throughout her career, Kouzuki has built a substantial portfolio of roles in major anime franchises. She provided voices for Rina in the long-running series Atashin'chi and Hazuki in Crayon Shin-chan. In the fantasy series MÄR, she voiced the character Benny, and in the action-comedy Gintama, she took on the roles of Gyaru B and Kurin-chan. She was also part of the cast for Corpse Princess: Aka and its sequel, playing the character Hina. Her work in the popular game and anime franchise Inazuma Eleven was significant, where she voiced multiple characters including Atsuko Endou, Mako Kisaragi, and Hiroyuki Taniguchi.

Kouzuki's work is also extensive in the video game industry. She is perhaps best known for her long-running role as the teacher Accord in the Puyo Puyo series, appearing in numerous installments from Puyo Puyo Fever onward. She also voiced Popoi in the same franchise. For fans of the Melty Blood fighting game series, she is the voice of Miyako Arima, a role she also reprised in the anime adaptation Carnival Phantasm. Other notable game credits include Viese Blanchimont in Atelier Iris 2: The Azoth of Destiny, Noella Martyr in Atelier Iris 3: Grand Phantasm, and Elena in Growlanser IV. She also voiced Lin in the Hokuto no Ken game.

In addition to her work in Japanese animation and games, Kouzuki has performed voice-over work for foreign film dubs, contributing to releases such as The 100 Nights and Vanishing Air. Her skills have also been utilized for narration on television programs for broadcasters like NHK. Outside of her professional life, her personal interests include collecting angel-themed goods and mail-order catalogs, and she has noted a special skill for being able to move her ears.