Roberto Santiago was born in Madrid in 1968. He studied Image and Sound at the Faculty of Communication Sciences at the Complutense University of Madrid and Literary Creation at the Madrid School of Writing.

Writer by day, superhero by night. When he was eleven years old, Roberto Santiago put on a mask and a cape and took to the streets to save humanity. Since then, he has already saved two kittens, a fern and an abandoned dog. As for the rest of humanity, he's still at it.

Rocío Alejandro (Buenos Aires, 1978) studied graphic design for advertising, but illustration for children's book is her real vocation. She has participated in a number of workshops and courses that have helped to shape her artistic career.

Rocío Araya is a Basque artist. She lives in France and works as an illustrator and painter. She was born in the Basque Country in 1982 and studied Fine Arts at the Universidad del País Vasco and in 2010 did a master's degree in education.

Rocio Bonilla (Barcelona, 1970) has a degree in Fine Arts from the University of Barcelona and has worked as a designer, painter, and teacher. Currently, she spends most of her time illustrating books and painting children's murals.

Rocio Bonilla (Barcelona, 1970) has a degree in Fine Arts and created Érase una vez (Once Upon A TIme) a mural project after more than a decade working in advertising. She later began illustrating books and her first publication was 'Cara de pájaro' ('Bird Face'), a solo project.

Rocio Bonilla (Barcelona, 1970) has a Fine Arts degree and created 'Érase una vez', a mural painting project, after more than a decade working in advertising.