Yūko Mizutani (水谷 優子 Mizutani Yūko ) was a Japanese actress, voice actress and singer from Aichi. She died in May 2016 as a result of breast cancer, aged 51.
Mizutani is known for portraying "Ada Wong" in Biohazard 2 Drama Album ~The Female Spy Ada Lives~. Mizutani also played the roles of Toby Masuyo, Katana and Ninety Nine in Namco × Capcom. She appeared in Project X Zone as Iris, Katana, Akatana and Byakuya X, and played the last three again in Project X Zone 2.