In the 2012–13 season, Cesario competed at the Junior Grand Prix in Austria where she earned the bronze medal. She went to the Junior Grand Prix in Germany, but was injured and withdrew after the short program. At the 2013 U.S. Championships, she placed 8th and earned a spot on the Junior World Team. Cesario placed fourth at Junior Worlds after placing 1st in the short program and 4th in the free skate. Due to misaligned knees, she attempted 3Lo–3Lo combinations more commonly than 3T–3T ("jumps") in order to reduce pressure on her facet joint.