Stéphanie Vondenhoff is a Belgian voice actress and singer, born on July 7, 1980, in Liège, Belgium, who is also known professionally as Stéphanie Euphoria. Her career is marked by contributions to the French dubbing of anime and involvement in music projects.

Vondenhoff is best known for providing the French voice for the character Washimi in the popular anime series Aggretsuko and its associated special, Aggretsuko: We Wish You a Metal Christmas. Washimi is the no-nonsense secretary and one of the main character's confidantes at her office job.

Beyond this prominent role, her work in anime voice acting is extensive, with numerous supporting roles documented from 2015 onwards. Her filmography includes a supporting part in the television series from the winter of 2017 and a role in a 2015 movie. More recently, she has been credited in supporting roles for original net animation series in 2019, 2020, 2021, and 2023, and is slated for a main role in a television series premiering in the winter of 2026. In addition to character voices, she has performed theme songs for the French localizations of various anime, including work on projects in 2015, 2018, and 2023.

In parallel with her voice acting career, Stéphanie Vondenhoff is also a singer and has been a member of the bands Shah-Mat and Nolia.