The sisters were originally involved in figure skating as small children, but Hannah switched to hockey at age 5, with Marissa following suit a few years later. They then played on the same teams until Marissa graduated from Hill-Murray School a year before Hannah; Marissa went to NCAA Division III school Gustavus Adolphus College while Hannah went to Minnesota. Both won gold medals at the 2017 IIHF Women's World Championships—Hannah for Team USA in the top division, and Marissa for South Korea in Division II (the third level) under her birth name of Park Yoon-jung. The sisters played in the 2018 Winter Olympics.