Sérgio Fortuna is a Brazilian voice actor, locutor, and musician, born in Rio de Janeiro, recognized for his extensive work in dubbing animations, films, and series for the Brazilian market. He began his career as a locutor at the renowned Herbert Richers studio in the 1990s and has been working at Wan Mächer since the early 2000s. His body of work is characterized by a wide range of characters, from villains and authority figures to protagonists in major franchises.

Fortuna is the official Brazilian voice for the iconic character Master Chief in the Halo video game franchise, having voiced the character in main titles such as Halo 3, Halo 4, Halo 5: Guardians, and Halo Infinite, as well as in the animated series Halo Legends. His association with the character extended to a special collaboration for the Waze navigation app, where he voiced Master Chief for a themed voice pack celebrating the franchise's 20th anniversary.

In animation, Fortuna has voiced a wide array of characters across numerous productions. Among his most notable roles are Gantu in the anime-influenced series Stitch!, Dr. Facilier in The Princess and the Frog, Tai Lung in Kung Fu Panda, and Santa Claus in Rise of the Guardians. He has also been the voice of characters such as Windlifter in Planes 2: Fire & Rescue, Brainiac in Legion of Super-Heroes, and various roles within the Star Wars universe, including Darth Vader in Star Wars Rebels.

His versatility extends to live-action dubbing for film and television. Fortuna has provided the Brazilian voice for actors such as Mandy Patinkin in Criminal Minds and Homeland, Ben Kingsley in Iron Man 3, and Common in Now You See Me. He has also dubbed iconic characters like Darth Vader in various Star Wars films and the Monster in Harry Potter and the Deathly Hallows – Part 1. Beyond these roles, he is known for voicing Thrall in the Warcraft franchise and Nautilus in League of Legends. His extensive career showcases a consistent presence in Brazilian dubbing, lending his voice to a vast spectrum of characters across all media.