Y/N was with the Order of the Phoenix and got captured by deatheaters during the Battle of the Seven Potters. The slytherin group is tasked to watch over her and interrogate her for information. They’d never really known her except for being ‘that one Gryffindor that hung out with Luna Lovegood’ and that she is a powerful witch. Slowly they start to realise the Order isn’t coming for her. And that even with that knowledge, she is so loyal that she will never reveal their secrets.