She initially has no problem with Marina but this quickly changes when she slips on the wet floor and bumps into her, knocking all her clean dry plates into the dirty sink. Marina shoves her and Delfina shoves back, telling her that she is going to pay and to watch her back when Sister Dora tells them to stop. The next morning all four girls were found by Sister Lucia in the nave, they were assumed to have been up to no good and were taken back to their bedroom, dazed and bruised. She is present during the Mogadorian attack of Santa Teresa.