Rubuta ci gaba don wannan sakin layi - Ta taka leda a Babban Teamungiyar Nationalasa a Wasannin Wasannin Wasannin Olympics na 2008 a Japan. A can ƙungiyar ta ƙare a matsayi na huɗu, kuma ba ta cancanci shiga gasar Olympics ta bazara ta 2008 ba. Daga nan ta buga wasa a watan Yuli tare da National Junior Team, inda ta lashe lambar azurfa a gasar NORCECA Junior Continental Championship U-20 ta 2008, kuma an zabe ta a matsayin Mafi kyawun Mai Kyau, Mafi Kyawun Libero, Mafi Kyawun Digger da Mafi Kyawun Mai Karɓa. Ba da daɗewa ba bayan haka Castillo ta yi ikirarin tare da Babban Team dinta lambar zinare a gasar Kofin kwallon raga ta Mata ta Pan-American ta 2008
a Mexico a lokacin da yake dan shekara goma sha shida. Daga baya a wannan shekarar tawagarta ta lashe lambar azurfa a gasar cin kofin Final Four, yayin da ta lashe kyautar "Rising Star".