Aureliano Castillo León is a Mexican voice actor, dubbing director, translator, and theatre artist with a multifaceted career in entertainment. Born in Xalapa, Veracruz, in 1989, he began acting in theatre at the age of nine, inspired by his parents, who were also theatre actors. His academic background is extensive; he holds a bachelor's degree and a master's degree in philosophy from the National Autonomous University of Mexico, where he is also a doctoral candidate. His formal training in dubbing began in 2014 under the tutelage of Olga Donna-Dío and José Luis Orozco.

In the realm of anime voice acting, Castillo León has contributed to several notable series. As the user mentioned, he provided the voice for the Chief Editor in the 2021 anime series MARS RED. He is also known for his work in the long-running series Black Clover, where he voices multiple characters including Zagred, Kaiser Granvorka, and Gadjah. His other anime credits include roles in Junji Ito Maniac: Japanese Tales of the Macabre as Funakoshi, Kageki Shojo! as Tamotsu Onodera, and Me enamoré de la villana as Lorek Kugre. He also voiced a monk in the third season of the animated series Castlevania. Beyond anime, his voice acting spans live-action series and films, such as playing Kirishima in the 2023 adaptation of Yu Yu Hakusho, Jang-Do in Sabuesos, and appearing in Estamos muertos.

Castillo León's involvement in the dubbing industry goes beyond performing. He has taken on significant responsibilities as a dubbing director, leading the Spanish dubbing for major projects. His directing credits include the third and fourth seasons of the anime Black Clover for Crunchyroll and the series Ōoku: The Inner Chambers for Netflix. He also directed the dubbing for the film Black Clover: Sword of the Wizard King and the live-action series Sabuesos. In addition to direction, he has worked as a translator and adapter for various films and series, including the 365 Days film trilogy on Netflix. His work is characterized by a commitment to quality and accessibility, viewing dubbing as a vital tool to bring international stories to Spanish-speaking audiences.