Sergio Capelo is a Spanish voice actor known for his extensive work in dubbing anime and animated films into Spanish, primarily for releases in Spain. His career encompasses a wide range of characters, from authoritative figures and villains to comedic roles and mentors, demonstrating his versatility across numerous popular franchises.

Capelo has provided the Spanish voice for a vast array of characters in both television series and feature films. He is notably the voice of the elderly martial arts master Silver Fang in the first season of One Punch Man, a role for which he also voiced several other characters including Beast King, All-Back Man, and Pastone. He is a recurring presence in the long-running Case Closed franchise, voicing Professor Hiroshi Agasa in films such as Case Closed: Zero the Enforcer and Case Closed: The Fist of Blue Sapphire, a role he reprised for the crossover film Lupin III vs. Detective Conan The Movie. In the same Lupin III crossover, he also voiced the character Luciano Carnevale.

His work spans many major anime titles and acclaimed films. He voiced Borma, a member of the covert ops unit, in Ghost in the Shell: Arise and Ghost in the Shell: The New Movie. In the film The Deer King, he voiced the King of Aquafa. He has also taken on villainous roles such as Grunwald in the classic film Horus: Prince of the Sun and Bear King in the second One Piece movie, One Piece: Nejimaki Shima no Bōken. His filmography includes the role of Manjido in Miss Hokusai, Two Horns in Appleseed Alpha, and Rodin in Bayonetta: Bloody Fate. He also voiced Ryuji in Saint Young Men and Yoshito Takaesu in Psycho-Pass: Sinners of the System.

Beyond the roles specified, Capelo's voice can be heard in a wide range of other anime series and films dubbed in Spain. His credits include providing voices for Dragon Ball (as Mr. Satan in the Valencian dub), Attack on Titan, Sword Art Online, Tokyo Ghoul, Fairy Tail, and Noragami, among many others. He has also contributed to films such as Akira (in the Valencian dub), Mazinger Z: Infinity, and Giovanni's Island.

Capelo has frequently worked on dubs directed by César Lechiguero, such as the first season of One Punch Man and Ghost in the Shell: The New Movie, often alongside a regular ensemble of Spanish voice actors. He has also worked under the direction of Carlos Nogueras on films like Miss Hokusai and Saint Young Men. His extensive and varied body of work establishes him as a prominent and active figure in the Spanish dubbing industry for anime.