Mercedes Espinosa is a Spanish dubbing actor with an active professional career, known for her work in anime, animated series, and video games for the Spanish market. She possesses a deep voice type and has provided the Spanish voice for a wide array of characters across numerous productions.

Espinosa is the habitual Spanish dubbing voice for several English-language actors, including Blair Brown, Beverley Elliott, Mindy Sterling, and Harriet Walter. Her extensive filmography demonstrates a long-standing presence in the Spanish dubbing industry, with credits spanning from the 1990s to the 2020s.

Her work in anime is particularly notable for its breadth. She is recognized for voicing Max Taylor in the series Dinosaur King and its second season. In the OAV series Kigurumi Sentai Quiltian, she voiced multiple characters, including Aya Tenjikudou and Doll Dora. Other significant anime roles include Kinta in Mirmo Zibang!, Charmander in Pokémon Mystery Dungeon: Team Go-Getters Out of the Gate!, and Youga in Karakuri Ninja Girl. She also contributed her voice to the Studio Ghibli film The Secret World of Arrietty, playing the role of Haru.

Beyond these credits, Espinosa's career encompasses a vast range of other characters. She is known for her long-running role as Sonoko Suzuki and Detective Sato in the Spanish dub of Detective Conan (also known as Case Closed). Her voice can be heard in numerous other popular anime series, such as One Piece, where she voices characters like Dona Natividad and a young Franky, Inazuma Eleven, Beyblade: Metal Fury, Bobobo-bo Bo-bobo, Carole & Tuesday, and Saint Seiya. Her work also extends to animated series like Rugrats and live-action dubbing for films and television series. In addition to animation, she has lent her voice to major video game franchises, including World of Warcraft and God of War.