Mayuko Natsuya is a credited name used by the Japanese voice actress Yurina Hase, who was formerly known as Yurika Ochiai. Yurina Hase was born on December 9, 1979, in Shizuoka Prefecture, Japan. She began her voice acting career after passing a free new artist audition in 1999 and training at the Japan Narration Acting Institute. Hase was previously affiliated with several talent agencies, including Arts Vision and Genki Project, before her retirement from voice acting in 2014.

Hase is known for several major anime and video game roles. She is recognized as the original voice actress for Yukiho Hagiwara in The iDOLM@STER franchise, appearing in the game The iDOLM@STER: Live For You! as well as various drama CDs and concerts. Another prominent role is Konomi Yuzuharu in the ToHeart2 series of anime and games, a character she voiced across multiple OVAs including ToHeart2, ToHeart2 ad, and ToHeart2 adplus. Her other notable anime roles include Aloe in Quiz Magic Academy, Rara Hinagiku in Futakoi and Futakoi Alternative, Suzume Saotome in Hyakko, Yurika Sasaki in Lovege Chu ~Miracle Seiyuu Hakusho~, Keiko Takamura in Uta∽Kata, and Thursday in Makai Senki Disgaea. She also had a guest role as Toyokawa Yui in episodes 129-131 of Bleach. Under the name Mayuko Natsuya, she played the role of Machiko Natsukawa in the OVA series Panty Flash Teacher. In addition to voice work, she contributed theme songs and character songs for many of the series in which she starred and was a member of the voice actor units Crystal Cherries and TORICO.