The Dominican Republic head coach gave Castillo a little participation during the 2014 FIVB World Championship NORCECA qualification tournament held in La Romana, Dominican Republic, even when the audience claimed for her appearance. Nonetheless, she helped her team to reach a berth to the 2014 World Championship in late May. Later in Mexico City, Mexico, Castillo help her national team to clinch the 2014 Pan American Cup championship and the 2015 Grand Prix berth. For her performance during the tournament, Castillo won the Most Valuable Player, Best Libero, Best Digger and Best Receiver.