Hogwarts' school of Witchcraft and Wizardry. Mira looked up at the school from her boat in the first-year's group, the wind whipping her long silver-white hair into her dark blue eyes. They were in the middle of the lake after being picked up by the giant man called Hagrid. He seemed friendly enough, but he had almost scared Mira, which would have been a very bad thing. The only other person who knew about her 'condition', as she called it, was her fourth-year sister Alexia. Mira hated her so much, perfect, wonderful, stupid Alexia. Why couldn't she be more like her sister? These were the words her parents spoke so often. The answer was simple.
Mira wasn't normal, even for a witch. She would never be normal. And it was their fault for being such idiots. Her parents, a pure-blooded witch and a half-blooded wizard, only had room in their hearts for one daughter, leaving Mira shoved aside and used for testing new spells. Mostly they worked, and she was grateful for that. Her parents were smart, her father had been in Ravenclaw, her mother in Slytherin.
Mira's eyes had been green once, her hair dark grey, nearly black. Until that one spell they invented themselves, the splitting spell whose incantation Mira could not remember and didn't particularly want to. Her father obviously didn't get put in Ravenclaw on account of good judgment.
As usual, they had pulled Mira out of whatever she was doing to try out a new spell they heard of, only they told her that it was new, never heard of, never used. Mira tried to pull out as her nerves hit the roof, her heart feeling like it would explode from beating so hard, but the spell didn't go quite right. It split Mira, but not in the way they imagined. Her mother, thinking she was better at magic as a pure-blood, knocked her father aside, grabbing Mira's forearm and pointing her wand down at her resisting daughter.
"It will only hurt a little, we'll fix you right up later." she insisted, reading the instructions they had written up on a piece of parchment. She said the spell quickly as Mira started panicking, a flash going up from her mother's wand, an extreme pain ripping across Mira's arm and running up to her shoulder, her neck, her head and into her mind. It dug into her consciousness. It tore her apart, splitting her in two as she panicked and tumbled to the floor, feeling like she was dying. Her parents stared, open-mouthed at their young daughter as she was still on the floor, color draining from her. Her dark grey hair lost any and all black in it, starting from the roots and turning the color of new snow. As the last dark colors faded from existence, her father called to Alexia. She rushed in, noting the scene in front of her, almost tripping on Mira's still little form. Her father waved a hand, uncaring.
"Do something with your sister, will you?"
Not the best, I'll be the first to admit. Sketchy, vague e.t.c but I am not the best writer :(