Jennifer Alyx is an American voice actress born on April 12, 1975, in Harvey, Louisiana. She began her career in voice acting for anime in the early 2000s, with one of her first major roles being Fate Testarossa in the 2004 series Magical Girl Lyrical Nanoha, a character she would reprise in the subsequent sequel, Magical Girl Lyrical Nanoha A's. Her early work also included roles in series such as The Familiar of Zero, where she voiced the character Tabitha.

Alyx has provided English voices for a wide range of characters across numerous anime series and films. Among her notable roles are Sae Chabashira in Classroom of the Elite, Hinata in Fire Force, and Long Island in Azur Lane. She is also known for her work in the Little Witch Academia franchise, voicing both Hannah England and Constanze Braunschbank Albrechtsberger in the 2013 film, the 2015 film The Enchanted Parade, and the 2017 television series. Her filmography includes supporting roles in Overlord III as Lumière, The Ancient Magus' Bride as Mina, and the Bang Zoom! Entertainment dub of the film 5 Centimeters Per Second.

Throughout her career, Alyx has frequently collaborated with other voice actors, such as Cristina Valenzuela, with whom she has worked on projects like The Familiar of Zero and Little Witch Academia. Based in the United States, she has worked with major dubbing studios including Funimation Entertainment, Crunchyroll, and Bang Zoom! Entertainment. In addition to voice acting, Alyx's professional experience extends to ADR directing, script quality control, and timecoding for animated projects.