The Last Army

Based on a Tumblr prompt I saw floating around on instagram: "Muggleborns wonder why there is a...group of teenage ghosts around Hogwarts...they're Dumbledore's Last Army." Just a muggleborn kid and their interactions with The Last Army. Credit to mugglebornheadcannon on Tumblr for the idea. Warning: mentions atrocities, mentions war crimes, mentions rape, PTSD implied