Monica Santhiago, born Marcia Seferin on April 1, 1975, in Porto Alegre, Rio Grande do Sul, Brazil, is a renowned Brazilian pornographic actress of Latin descent. The 5-foot-3-inch brunette spitfire entered the adult film industry in 2006 at age 31 after working as a kindergarten teacher. She studied Pedagogy and Psychopedagogy at the Pontifical Catholic University of Rio Grande do Sul before transitioning following an invitation from porn actor Don Picone.
Monica gained fame for her energetic performances in hardcore scenes, especially anal, appearing in films for studios like Evil Angel and others. Nominated for the AVN Award for Female Foreign Performer of the Year in 2010, she launched her official website in 2007. With a distinctive barbed-wire tattoo on her left buttock, she has remained active into the 2020s, celebrated for her voluptuous figure and professional dedication in the industry.