Resther is possibly best known for being the voice of Francine Alice Frensky in the PBS children's animated program Arthur since 1996. She also played the role of Kiki in Are You Afraid of the Dark? from 1991 to 1996. Additionally, Resther has appeared in Extra! Extra!, Vampire High, Undressed, and Fries With That, among others. In the English version of the Winx Club made by Cinélume in Quebec, Canada, Resther is featured as the Tecna character. She also lent her voice to Deus Ex: Human Revolution. Besides screen and voice acting, Resther has dabbled in music. In 2000, Resther released an R&B album title Real. Resther later released a French language record called Ma Dualité on the DEJA Musique label.
