Monica Jean Rial was born on October 5, 1975, in Houston, Texas, and is an American voice actress and ADR script writer affiliated with Funimation/Crunchyroll, ADV Films/Sentai Filmworks, and Toei Animation USA.

She provides voices for English language versions of Japanese anime films and television series. Her father is from Pontevedra, Galicia, Spain, and her family often visited Spain when she was young.

She would translate for her younger brother some of the European Spanish-dubbed cartoons, which included anime shows like Doraemon and Dragon Ball Z, often imitating the various characters.

Monica Rial studied ballet, tap, and jazz but transitioned to musical theater when she was 12. She continued her acting studies through high school and college at the University of Houston. Her first voice-over role was some walla in the 1999 dub of Martian Successor Nadesico.

She later landed main character roles as Miharu in Gasaraki, Natsume in Generator Gawl, and Hello Kitty in Hello Kitty's Animation Theater. In 2001, she voiced Izumi in the baseball anime Princess Nine and in 2002, she got to voice Hyatt in Excel Saga, which she listed among her absolute favorites.

Monica Rial has voiced numerous characters in popular anime series, including Kyoko Tokiwa in Full Metal Panic!, Kirika Yumura in Noir, and Lila in Najica Blitz Tactics. She started voice-over work with Funimation in 2004 and has voiced Amy in Case Closed and Lyra in Fullmetal Alchemist.

She is known for her wide vocal range and has voiced Bulma in the Dragon Ball franchise, Stocking in Panty & Stocking with Garterbelt, and Froppy in My Hero Academia.

Monica Rial has a younger brother, Miguel, and a younger sister, Natalie, who is also an actress. As of April 2019, she was engaged to Dallas-based realtor Ron Toye. Her lifestyle includes attending anime conventions where she receives feedback from fans and participates in DVD commentaries.

She has mentioned voice actor inspirations from The Simpsons, Family Guy, and Beavis and Butt-head.