Margaux Maillet is a French voice actor known for her work in the dubbing of anime and animated series. Her career is distinguished by her ability to convey a wide range of emotions through voice, often taking on characters with unique vocal requirements.

Maillet's path to voice acting was rooted in her early passion for performance, specifically in musical theatre and stage acting. She pursued formal training to hone her skills, which led to an encounter with the renowned voice director Barbara Delsol. This connection proved pivotal, as Delsol entrusted her with a significant role in the Netflix series Les Demoiselles du téléphone, which served as her entry point into the dubbing industry and helped launch her career.

She is most prominently recognized as the official French voice of Nezuko Kamado in the worldwide hit anime Demon Slayer: Kimetsu no Yaiba. Cast after auditions called by the artistic director Yann Le Madic, her voice was selected by the client for this central character. Maillet has voiced Nezuko across all major installments of the series, including the original anime, the Mugen Train Arc, the Entertainment District Arc, and the feature film Demon Slayer: Kimetsu no Yaiba - The Movie: Mugen Train. The role is particularly demanding as the character speaks very little, requiring the actor to perform a wide spectrum of emotions—from anger and combat ferocity to familial affection—through groans, grunts, and other non-verbal expressions. Maillet has described this process as requiring intense focus on memorizing Nezuko's specific intonations and moods.

Beyond Demon Slayer, Maillet has taken on other notable lead roles in animation. She was the voice of the protagonist Marla in the 2019 animated film Playmobil: The Movie, a role she has described as an incredible and liberating experience due to the expressive nature of animation dubbing. Her work in the anime genre extends to the series Ultraman, where she voiced the character Izumi, and Sleepy Princess in the Demon Castle, further establishing her presence in the French anime dubbing community.

Throughout her career, Maillet has collaborated with key figures in the French dubbing industry. In addition to her ongoing work with director Yann Le Madic on Demon Slayer, her early mentorship under Barbara Delsol was a significant factor in her career development. She has also worked with the studio VF Productions, known for its work on major anime series like Demon Slayer. While continuing her voice work, Maillet remains active in theatre, balancing her time between the recording studio and the stage, where she has appeared in productions such as L'Embarras du Choix.