Rina Satou is a Japanese voice actress and singer born on May 2, 1981, in Kitakyushu, Fukuoka Prefecture. She is affiliated with the Tokyo Actor's Consumer's Cooperative Society, also known as Haikyō. Satou decided to pursue a career as a voice actor from her fifth year of elementary school. She completed her training at the Haikyō Voice Actors Studio as a member of the 19th graduating class in 2001 and officially joined Haikyō the following year.

Her career advanced significantly in 2003 when she was cast in her first leading role as Negi Springfield in the anime adaptation of Magister Negi Magi, which aired in 2005 and brought her widespread recognition. This role showcased her ability to portray a young boy, a specialty she is known for alongside a wide range of other character types, including girls, women, and those with various personality traits.

Satou's career is marked by several long-running and iconic roles. She is particularly renowned for her portrayal of Mikoto Misaka in the A Certain Magical Index series and its spin-off, A Certain Scientific Railgun. She also voices Haruka Minami in the Minami-ke series and Rei Hino / Sailor Mars in the Pretty Guardian Sailor Moon Crystal and Eternal films. Other major roles include Makoto Niijima in Persona 5 the Animation, Vert / Green Heart in the Hyperdimension Neptunia franchise, Tōru Taki in Natsume's Book of Friends, and Shura Kirigakure in Blue Exorcist. Her filmography also includes Kaede Kagayama in Non Non Biyori, Mii in BOFURI: I Don't Want to Get Hurt, so I'll Max Out My Defense., Ayaka Sunohara in Miss Caretaker of Sunohara-sou, and Gundula Rall in Brave Witches. More recent roles include Senjumaru Shutara in Bleach: Thousand-Year Blood War and Hilling in Ranking of Kings.

Throughout her career, Satou has frequently collaborated with a number of fellow voice actors. She has a close professional and personal friendship with Newii Arai, with whom she has worked in numerous projects, particularly those set in the A Certain Magical Index universe. She has also been part of several informal groups and formal units with other voice actors. These include the Magister Negi Magi Haikyo Team with Hazuki, Junko Minagawa, Miho Sakuma, and Sawa Ishido, and the unit N's, formed in 2008 with voice actors from Nogizaka Haruka no Secret, which later evolved into N±. She is also part of the KAT-TUN会 (KAT-TUN-kai) with Hitomi Nabatame, Ryō Hirohashi, and Noriko Shitaya.

In 2014, Satou received the Award for Best Lead Actress at the 8th Seiyu Awards, an honor largely attributed to her performance as Mikoto Misaka in A Certain Scientific Railgun S. Beyond anime, her work extends to video game voice acting, with notable roles such as Velvet Crowe in Tales of Berseria and Eula Lawrence in Genshin Impact. She is also a singer, having performed character songs and theme music for various projects. In 2016, Satou announced her marriage and the birth of her first child.