Valero has a degree in social sciences. She has been regional secretary general of the Justice First party in the Mérida state. She was elected as deputy for the National Assembly for Circuit 4 of the Mérida state for the period 2016–2021 in the 2015 parliamentary elections, representing the Democratic Unity Roundtable (MUD) and Justice First. In 2016 she was a member of the Parliamentary Commission of Comptrollership.[1][2]
Milagro has been exiled in Spain since early 2019.[3]