Belén was born in Madrid in 1994. She earned a degree in Primary Education, graduating top of her class in the bilingual group and specialising in foreign language teaching. She received an Erasmus scholarship in 2016 which led to a stay in Canterbury, England, completing the last practical training of her degree. She did a Master's degree in Information and Communication Technologies (ICT) applied to Education in the Autonomous University of Madrid in 2018/2019. At the end of this Master, she got a scholarship to be a Spanish Lecturer at Eton College, Windsor. She currently works as a teacher at CEBIP Rosalía de Castro, Madrid. She speaks English and French.