Sébastien Baulain is a French voice actor born on 15 June 1993 in Niamey, Niger, recognized for his work in the dubbing of anime series, animated films, and video games into French. He has established a significant presence in the French voice-over industry, lending his voice to a wide array of characters across various genres.

Baulain's career is prominently defined by his roles in numerous popular anime series. He is the French voice of Joseph Joestar in JoJo's Bizarre Adventure, a role that covers the character's younger iterations. He also voices Hyoma Chigiri and Yuya Naruhaya in the sports series Bluelock. His other notable anime credits include Maimakterion and Zan Amal in Lucifer and the Biscuit Hammer, Rod Bauer in I'm in Love with the Villainess, Auguste Zelm in I'm the Villainess, So I'm Taming the Final Boss, and Arata Tsuruki in My Happy Marriage. He has also been heard in major series such as Mashle: Magic and Muscles, The Misfit of Demon King Academy II, Oshi no Ko, Overlord IV, Rent-A-Girlfriend, So I'm a Spider, So What?, Tiger & Bunny 2, Urusei Yatsura, Vinland Saga, and the ONA Kotaro Lives Alone.

Beyond anime, Baulain's work extends to video games and live-action dubbing. In the gaming world, he provided the French voice for Alex Malto in Transformers: EarthSpark - Expedition and for the characters Mint Choco Cookie and Herb Cookie in CookieRun: Kingdom. He voiced the title character, Jaime Reyes / Blue Beetle, in the 2023 live-action film Blue Beetle. His film work also includes a role in the 2020 thriller Enragé, where he dubbed the character Léo.

His contributions to the field have been acknowledged through his participation as a featured guest at pop culture events, such as the Paris Manga & Sci-Fi Show in 2024, where he took part in conferences dedicated to the art of dubbing alongside other renowned French voice actors.