John Estanislau is an American voice actor and social media marketing professional born on August 3, 1992, and based in Los Angeles, California. Beyond voice acting, he works as a Twitch Partner and has developed marketing campaigns for major brands including Disney, Razer, Ford, and McDonald's. In the voice over field, he has performed in commercials, cartoons, video games, and television shows.

Among his most recognized anime voice roles is Duke Gerard Muska Vespaland in the English dub of the crossover special Lupin III vs. Detective Conan. He also voiced the Vault Manager in the film Lupin III vs. Detective Conan The Movie. Additional anime credits include Cait Sith in an episode of Sword Art Online II, as well as voice work for The Seven Deadly Sins and Miss Monochrome. In video games, he provided additional voices for Earth Defense Force 2025. His performances have been produced through Bang Zoom! Entertainment, a studio known for English dubs of Japanese anime. No recurring collaborations with specific directors or fellow voice actors, nor major industry awards or nominations, are documented in available records.