Mar studied Spanish and Asturian Philology at the University of Oviedo. She collaborated with the Academia de la Llingua Asturiana as a researcher and writer. She published La llegada, an illustrated album in Asturian with the Pintar Pintar publishing house and two collections of poems: Engranaje and Atalaya with the Torremozas publishing house. She was a scriptwriter for the radio theatre programme Nomes d’Asturies, a teacher of Asturian language for adults, a guide at the Muséu del Pueblu d’Asturies and is currently a guide for the Reading Club at the Pumarín Gijón Sur Library and co-author of the podcast on literature “En los márgenes” (ivoox)