You, Theodore Nott, Blaise Zabini, Pansy Parkinson, Draco Malfoy, Lorenzo Berkshire, and Mattheo Riddle, have all been friends since you were toddlers. You are the Princess of Slytherin, till one day in 6th year, you’re told by all of them “Gotta let go of all of our ghosts we both know we ain’t kids no more”. Your heart shatters.
It is the final battle, Belatrix LeStrange is fighting Molly Weasley. Bela gets hit, and just before she dies, she locks eyes with you, her child. Then she’s gone. No one knows you’re her child before this point.