Keyros Guillén was a Mexican actress and voice actress known for her extensive work in theater, television, and the Latin American Spanish dubbing industry. Born on September 16, 1966, in Mexico City, she later relocated to Chile, where she became active in the local entertainment scene and taught dubbing classes at Finis Terrae University.

Guillén built a prolific career voicing characters in international film, television, and anime productions for the Latin American market. She is well-known for providing the voice of Mihoshi Kuramitsu across multiple installments of the Tenchi Muyo! franchise, including the original Tenchi Muyo! series, Tenchi Muyo! Ryo-Ohki, the Tenchi Muyo! Mihoshi Special, and Tenchi in Tokyo. Her other notable anime roles included Yoriko Nikaido in You're Under Arrest and characters in the series Marmalade Boy. She also voiced Licorice Nielsen and Fienna in different adaptations of Orphen, including Orphen: The Revenge. Beyond anime, her voice acting credits included the second voice of Samantha Carter in the Stargate franchise and Princess Yue in Avatar: The Last Airbender. In addition to her voice work, she performed on stage, appeared on television, and had a role as Alicia in the Chilean series Mea Culpa. Keyros Guillén died from cancer on November 13, 2014, in Santiago, Chile, at the age of 48.