Black Water {Barty Crouch Jr}
23 parts Complete Being James Potter's little sister was hard, especially when he was overprotective but when Sage got sorted into slytherin, her parents were disappointed in her while James was more supportive but not happy he had told her not to hang around anyone in that house, and just stick to his friend group which was advice she obviously didn't listen to when she became friends with her Best friend Barty
(also, let me know if I made any spelling errors or anything)