Castiglione has represented the Argentina national team in various tournaments since 2004, including the Pan-American Volleyball Cup (in 2008, 2011, 2012, 2013, 2014, 2015, 2016), the FIVB Volleyball World Grand Prix (in 2011, 2012, 2013, 2014, 2015, 2016), the FIVB Volleyball Women's World Cup (in 2011, 2015), the 2014 FIVB Volleyball Women's World Championship in Italy, the 2015 Pan American Games in Canada, and the 2016 Summer Olympics in Brazil. During the Olympics she married the retired Brazilian volleyball player Marcus Eloe in a Buddhist ceremony.