Santos made her first international appearance in cross country running at the 2013 IAAF World Cross Country Championships and on her first attempt placed 69th in the women's race. She ran a personal best of 16:56.73 minutes for the 5000 metres of the track that summer. Two international medals came at the 2014 Ibero-American Championships in Athletics, held on her home area of São Paulo. She was the bronze medallist in the 1500 m and successfully stepped up a distance with a gold medal over 3000 metres. In spite of this success, when it came to the national stage she was relegated to runner-up in both middle-distance track events, losing to Jessica dos Santos in the 800 m and Flavia de Lima in the 1500 m.