Blackthorn Hall, a Mystery.

Lisa had not been even a little shocked when her Hogwarts letter arrived. She almost wished it had felt bigger, the way it probably did for muggle-born children, but her family was the oldest wizarding line in the world, so she'd been waiting for it anyway. Magic was everywhere around her, and she sort of resented that she had to sit through school before anyone would officially let her pick up a wand and do magical things, because Lisa had never exactly needed a wand for magical things in the first place. The entire idea of school struck her as ridiculous. Her cousins had already told her what Hogwarts was like. Lessons, studying, essays, tests, and ancient people barking orders. Gross. If Lisa hated anything, it was being ordered around. Old people especially, because in her experience they were usually the stupidest ones in the room. Anyway, Lisa didn't believe she needed Hogwarts. She was already a brilliant flyer, which had been proven the time she stole Bambam's broom when she was four and shot straight at her oldest aunt so fast the woman thought Lisa meant to hit her, panicked, and sloshed the fire whiskey she was holding over the precious dress robes she'd spent all night boasting about. Bellatrix Lestrange had owned them, her aunt had informed anyone who drifted within five feet, because she was absurdly proud of the robes' bloodline. No one in her rich family would touch secondhand clothes unless they could be called historical artifacts, and in her dark-lord-sympathizing pureblood family anything Bellatrix had once touched counted as priceless, so naturally those stupid robes were treated like holy relics. Her aunt announced their history the moment anyone looked at them. They were purebloods, after all, and nearly everyone in Lisa's family except one uncle and aunt, Bam's parents, took pride in that and made no effort to hide how much they hated muggleborns, but nobody worshipped their own wizard blood more viciously than her oldest aunt. Lisa hated all of it, even at four, though she couldn't have explained why. So of course she stole Bambam's shiny new broomstick, the birthday present he'd gotten when he turned eight, and aimed herself straight at her aunt to punish her for bragging about a death eater's dress robes, flying as fast as she could to terrify her before veering upward at the last possible second and cackling while her aunt screamed because she thought tiny Lisa was about to slam into her. Afterward Lisa's mother scolded her and even declared that their house elf would not clean Lisa's room for the rest of the week, meaning Lisa would do everything by hand like the 'pathetic' muggles supposedly did, but Lisa thought it was a fair trade. Their house elf deserved time off anyway. Lisa was friends with Tink, and she thought her mother made Tink work far too hard, so taking some of that load off Tink's back didn't upset her. Lisa absolutely did not regret frightening her aunt. Not when Bambam had walked up afterward and told her she'd better try out for house quidditch the moment she was old enough to attend Hogwarts. From then on Lisa knew exactly what she wanted once she was grown. She was going to play quidditch for a living. Flying loved her, she loved it back, and no other feeling or career could compete with spending all day on a broom and getting paid for it. Jennie Kim, meanwhile, nearly had a heart attack when a letter turned up offering her a place at the Hogwarts School of Witchcraft and Wizardry. The letter had come in the strangest possible way. A weird woman called Luna showed up at her orphanage and more or less explained that the reason Jennie had spent over half her life scrubbing floors, toilets, dishes, and doing every extra chore that landed on her whenever strange things happened around her after the other kids set her off -- which was about every thirty minutes because everyone around Jennie were idiots, if anyone asked her -- was that she was a witch with actual magic, which was why Hogwarts had offered her a place to study and hone it. Luna, who had been dreamily staring at books that honestly belonged to someone twice Jennie's age because the reading level was brutal, said Jennie was being invited to study at Hogwarts, which was apparently the finest magical school there was. By then Jennie was used to pranks and constant bullying, and she'd gotten sick of all of it around age six, so she didn't hesitate to grab the nearest object and fling it at the woman's head for inventing ridiculous lies about magic.