Ismael Castro is a Mexican voice actor born on March 29, 1952, in Mexico City, who has been active in the dubbing industry since 1986. In addition to his voice work, he has also occasionally worked as a dialogue director and is a licensed dentist by profession. His career spans work as a singer, announcer, and television actor alongside his extensive voice acting credits.

Castro is known for a wide range of voice roles in anime dubbed into Spanish for the Mexican and Latin American markets. He is recognized for playing Hiro in the series Mirmo Zibang! and for providing the voice of King in the film Tales from Earthsea. He also voiced two distinct characters in the film Castle in the Sky: the antagonist Muska and the character Tío Pom. His other notable anime credits include roles in long-running and popular series such as Cowboy Bebop, where he voiced characters like Mao Yei Ran and Alfredo, and Captain Tsubasa, where he was the second voice for Ichiro Misaki. He also lent his voice to the Saint Seiya franchise as Maya de Flecha and the reincarnation of the goddess Eris in the film Saint Seiya: Evil Goddess Eris. Further anime work includes roles in Bubblegum Crisis: Tokyo 2040, Burn Up Excess, Knights of Sidonia, and the Mexican dub of the 2016 film Yu-Gi-Oh!: The Dark Side of Dimensions as Solomon Mutō.

Beyond animation, his career is heavily defined by dubbing live-action film and television. A prominent example is his role as the house-elf Dobby in the Mexican Spanish dubs of the Harry Potter films, including Harry Potter and the Chamber of Secret and Harry Potter and the Deathly Hallows – Part 1. He is also recognized for being the voice of Norman Osborn, also known as the Green Goblin, in the 1990s Spider-Man: The Animated Series. His extensive filmography includes work on major Hollywood productions, providing voices for characters in films such as the Kung Fu Panda franchise as Mr. Ping, Star Wars: The Force Awakens, and The Darkest Hour.

Castro's work demonstrates recurring collaborations within the dubbing industry, though specific directorial partnerships are not detailed in available records. His career shows a versatility that ranges from main characters in anime to iconic supporting roles in major film franchises. He continues to be active in the field, with more recent credits including voicing Abraham Erskine in the animated series What If?.