Isabelle Marques is a Brazilian voice actress known for her work in anime dubbing. She was born in Curitiba on June 16, 1994. Her career in voice acting includes several notable roles in Portuguese-language dubs of popular anime series.

Among her major voice roles, Marques is recognized for providing the Portuguese voice for Akane Daidoji in the series Milky☆Subway: The Galactic Limited Express. She also voices Eiko Aizawa in the series Squid Girl, a role she has performed across both the main television series and its subsequent OVA episodes. Additionally, she is known for her role as Nyaruko, the titular character, in the series Nyaruko: Crawling with Love! and its follow-up, Nyaruko-san: Another Crawling Chaos W.

Her other voice credits in anime include Ruriko Matsunai in Skip Beat!, Nelli Pepper in Tegami Bachi, Moe Yabasawa in Sket Dance, Lida Canales in Muv-Luv Alternative: Total Eclipse, Atla Fayon in The Rising of the Shield Hero, and Akito in Ririsa, Uma garota em 2.5D. Through these performances, Isabelle Marques has contributed a consistent body of work to the Brazilian Portuguese dubbing industry for anime productions.