Guilherme Maia is a Brazilian voice actor known for his work on the Portuguese dubs of various anime series. He is recognized for providing the voice of the hero Tsunagu Hakamata, also known as Best Jeanist, in the popular anime My Hero Academia, appearing in the show's second, third, and fifth seasons.

Beyond this prominent role, Maia has voiced a range of characters in other anime. His credits include the roles of Castor Vargas in How a Realist Hero Rebuilt the Kingdom, Cilene de Ceifador de Almas in Saint Seiya Omega, Masayoshi Ida in Stand My Heroes: Piece of Truth, and Mr. Burton in an episode of Moriarty the Patriot. He has also contributed to the Brazilian Portuguese versions of other well-known series such as Vinland Saga, Tiger & Bunny, Tiger & Bunny 2, Cowboy Bebop, Levius, Steins;Gate, and Wonder Egg Priority.

In addition to his voice acting, Guilherme Maia's career in dubbing includes technical roles. He has worked in audio captation and sound mixing for the Portuguese versions of Saint Seiya Omega and Saint Seiya: Soul of Gold.