Olga Supervia is a voice actor known for her work in Catalan and Spanish dubs of anime series and films. Her most prominent and long-standing role is providing the Catalan voice for the character Shizuka Minamoto in the Doraemon franchise. She has voiced Shizuka in numerous Doraemon productions, including the long-running television series from 1979 and 2005, many feature films such as Stand By Me Doraemon, and various specials like Doraemon: Boku no Umareta Hi and Doraemon: Nobita's the Night Before a Wedding.

Beyond her iconic role in Doraemon, Supervia has contributed her voice to a wide variety of other anime series and original video animations (OAVs) for Catalan and Spanish audiences. Her credited roles include Yui Narusawa in Dōkyūsei 2, Sapphie in the Jewelpet series, Doll Dora in Kigurumi Sentai Quiltian, and Mew in Words Worth. She also voiced multiple characters in a single series, such as taking on the roles of Minako Yamashira, Sayaka Matsumoto, and Sayuri Mizuki in the OAV Angel of Darkness, and Chisato Mamiya and Rie Makino in The Mystery of Nonomura Hospital. Her work in the 1990s also included roles in series like F3 as Hiroe Ogawa and End of Summer as Miho Suzuki.

In addition to her work in dubbing Japanese anime, Supervia has been involved in dubbing for other international productions and has appeared in credits for shows such as the Spanish dubs of Kamikaze Kaito Jeanne, Rurouni Kenshin, Reborn!, and Trigun, where she voiced Milly Thompson. Her career demonstrates a consistent and versatile presence in the field of voice acting for Spanish and Catalan language adaptations of animated content.