Bianca Tomassian is a French voice actress known for her dubbing work in anime and live-action productions. She was born on March 21, 2005, and comes from a family with a strong background in dubbing, being the niece of actor Alexis Tomassian and the cousin of actor Sacha Tomassian.

Tomassian began her career in voice acting as a child, with her early work including the French voice of Kristi in the 2015 film Paranormal Activity: The Ghost Dimension. She has since built an extensive filmography, providing the French voices for young characters in numerous live-action films and television series. Notable live-action dubbing roles include Su-an in Train to Busan (2016), Phoebe Spengler in Ghostbusters: Afterlife (2021), and Rose in Leave the World Behind (2023).

In animation, Tomassian is recognized for two significant leading roles in anime films. She voiced the title character, Oriko Seki "Okko," in the 2018 French dub of the film Okko's Inn (titled Okko et les Fantômes in French). She also provided the voice for Eve in the 2020 animated film Calamity, a Childhood of Martha Jane Cannary.

Tomassian is widely known for her role as Becky Blackbell, the best friend of Anya Forger, in the French dub of the popular anime series Spy×Family, a role she has played since 2022. Her other animation work includes voicing Hypatie in the 2024 film Orion and the Dark and Bree in the series Fancy Nancy.