Urresola was born on 4 May 1984 in Laudio/Llodio,[1][2] located in the province of Álava in the autonomous community of Basque Country in northern Spain.

She has bachelor's degrees in Audiovisual Communication from the University of the Basque Country[3] and Film Editing from the Escuela Internacional de Cine y Televisión.

Voces de papel is a 2016 full-length documentary about Eresoinka [fr; eu], a mixed instrumental, vocal, and choreographic ensemble of Basque performers that toured internationally from 1937 during the Spanish Civil War until the outbreak of World War II, which forced Eresoinka to return to Europe from the United States.

Urresola was affected by the poignant note Lersundi left behind to illustrate his despair and his hope that divulging his suffering might bring about a societal change.

[17][18] To help an accurate portrayal, Naizen [eu; es], a regional association for the families of transgender minors, worked with the director and provided guidance for Sofía Otero who played the main character.

[19] In the film, the family crosses borders, including the one that separates Bayonne in France and Laudio/Llodio in Spanish Basque Country.