As a single skater, Cain began competing on the ISU Junior Grand Prix series in 2011 and won silver on the junior level at the 2012 U.S. Championships. She won the bronze medal at the 2013 Nebelhorn Trophy, her first senior international. The following season, she took bronze at the 2014 Ondrej Nepela Trophy and was invited to two Grand Prix events, the 2014 Cup of China and 2014 Rostelecom Cup.