As an actress she has starred in feature films such as La reconquista (2016), which premiered in the Official Section of the San Sebastian Film Festival and was directed by Jonás Trueba, and Las Altas Presiones (2014) by Ángel Santos. During 2019 she has acted in the film by Daniel Sánchez Arévalo Diecisiete for Netflix, the series Vergüenza and Dime quién soy for Movistar Plus. Itsaso formed in 2004 the group of scenic arts La Tristura, with whom she creates, directs and acts in her own productions. These plays have all been performed in theaters and festivals of international prestige in Spain, France, Germany, Finland, Poland and Brazil, among others.