Daphne Greengrass. Who knew much about her? No one did. Everything about her lacked something that was never there.
Most of the people at school were beneath her. Daphne supported true pureblood supremacy; dismissing those beneath her with nothing more than a glance. They weren't worth her time. They were nothing more than insects, buzzing around her in an attempt to capture her attention.
Or perhaps she tried her best and made friends.
Or perhaps she was just a bitter eleven year old, cold to everyone around her.
And obviously, her OWL examiner couldn't see past the mudblood's (Gragem or something's) pitiful attempt at potioneering to correctly mark her potion, so really, the fact she couldn't get into the NEWT potions class was all his fault. Bloody examiner.
Or perhaps Snape really was that bad.
During the Battle of Hogwarts, Daphne could feel tremors and explosions shaking the grimy passage. Once, a rush of heat that made everyone sweat and made the narrow space even worse. She didn't care for the outcome.
Or perhaps during the Battle of Hogwarts, Daphne stood in the shadows, sending a stunner to anyone wearing a white mask and black robes.
Or perhaps during the Battle of Hogwarts, Daphne stood in the shadows, sending a beam of light towards anyone not wearing a white mask and black robes. Sometimes that beam was red. Other times, it was green.
Perhaps Greengrasses stood neutral.
Or perhaps they stood neutral enough; Voldemort's ideals were... appealing.
Or perhaps they stood neutral enough; but the right side was the Light.
Daphne Greengrass played such a small role in a story bigger than any of them. But her non-story gives her the biggest potential. And her potential immortalized her in fanfiction.