Fernando Castro, also known as Nano, is a Spanish voice actor who has been active in the dubbing industry since 2009. He pursued studies at a drama school in Madrid before entering the world of voice acting, where he has since become known for his work in anime, video games, and animated films.

Castro has provided the Spanish voice for a number of prominent anime characters. He is notably recognized for voicing Escanor in multiple installments of The Seven Deadly Sins franchise, including the series The Seven Deadly Sins: Revival of The Commandments, The Seven Deadly Sins: Imperial Wrath of The Gods, The Seven Deadly Sins: Dragon's Judgement, and the film The Seven Deadly Sins the Movie: Prisoners of the Sky. In the anime Kakegurui, he voiced the character Kaede Manyuda across both the first and second seasons of the series.

His work extends to other major anime productions. He has voiced characters in the One Piece franchise, including Akainu in the films One Piece Stampede and One Piece Film Red. His other anime credits include roles in Mashle: Magic and Muscles, Carole & Tuesday, To Your Eternity, and Pokémon XY.

Beyond anime, Castro has lent his voice to characters in significant animated films and video games. He voiced Bowser in the Spanish dub of The Super Mario Bros. Movie and provided the voice for Minoru Okabe in the film Suzume. In the video game industry, he has voiced characters such as the male version of Eivor in Assassin's Creed: Valhalla. His work in video games has earned him recognition, including receiving the award for best video game dubbing actor in 2020. The following year, in 2021, he was again honored as the best video game dubbing actor and also received an award for the best male dubbing performance in video games.