Mariela Ortiz is an American voice actress born on August 5, 1976, who has built a career spanning numerous English-language anime dubs and stage performances. Her work in anime is extensive, with roles primarily associated with productions by ADV Films and Funimation Entertainment.

Ortiz's filmography includes a wide array of characters across different series. Among her notable roles are Byakko in Moeyo Ken, Jun in Diamond Daydreams, and Urara Kasuga in Sakura Diaries. She also voiced the character Banba in the Funimation dub of Princess Jellyfish, a performance described as having a "rather boyish, with a clearly nerdy, slightly nasal sound that matches the character very well". Her other prominent anime credits include Yuka in Azumanga Daioh, Yuki Suzaki in D.N.Angel, Ringo Seto in Angelic Layer, Mittelt in High School DxD, Eldora in Selector Infected WIXOSS, and Alister Algrew in Last Exile: Fam, the Silver Wing. She has also contributed voices to English versions of films such as The Place Promised in Our Early Days and Shin Angyo Onshi.

Beyond voice acting, Ortiz has been involved in other aspects of production, having worked as a DVD coordinator and production assistant at ADV Films. She is also an accomplished stage performer, with appearances in theatrical productions in both Texas and New York. Based in Dallas, Texas, she has been active in the voice acting industry for decades, frequently collaborating with other voice actors such as Monica Rial, Chris Patton, and Kira Vincent-Davis on numerous ADV and Funimation dubs.