To gatekeep a book

Such a cold evening it was. Although the air was not cold enough that snowflakes felt the need to descend from the sky in their angelical and ethereal forms, students could buff and see their breath, and a thick coat was obligatory to every person in a normal state of mind. In such days, people who hated the outdoors and the magical feeling of flying on a broom hoped that they would not have to attend to Flying today.
Anna was one of those people, and she still didn't get over today's flying lesson. She hated flying, hated brooms, hated the feeling of not having both her feet on the ground in such a fragile object that could break so easily. What if she got hurt? Injuries weren't pretty. And she hated the emotion and unpredictability of flying. Unexpectedly, she may have been one of Mister Weems's worst students so far, which is quite a shame, the man himself was a good person and she wished she could bring him joy.
Although that has not happened in any day at all during her two years in Hogwarts, she still hoped maybe one day flying class got canceled. Maybe one day...
But enough of that! After such a experience, she deserves some calm and peace. Why not do two of her ever-favorite activities? She could dress up and go read in Hogwarts's library. Of coursh, she both read and dressed up almost every day, but it brought her some security to do something she was so used to, especially because she enjoyed it no matter how many times she repeated these activities.
In such a cold weather, one who picked their outfits well could look more elegant and cute than any other, and so after some minutes of analysing, she picked a brown dress with combining boots; they were adorable, and that's how Anna liked to feel: as though she was the loveliest, most adorable person in the world. Not that this ever brought her comparison issues; comparing herself negatively to others is not something the girl could naturally do, though she still admired other people and learnt from them. Because her hair was messy after that appalling flying lesson, she had to style it again, every lock of hair carefully hydrated and curled to the best of Anna's abilities. Once she was overdressed and ready, she took her loyal plushie companion, the stuffed penguin Aoibheann, and left the common room. These days, she waived him a Slytherin tie, so now he had one around his neck to complement his judgemental gaze... Well, at least that's what the black-haired girl thinks he'd have, at least.
She walked through the crowded castle until she arrived to the library, which was certainly one of the places she voluntarily spent the most time in. These days she had seen someone reading a book with a beautiful cover and a intriguing title, and she could not help but inquire about it; from the spoiler-free synopsis she received, that book was a rare jewel of deep philosophy, critical reflection and addicting prose. Today, she wondered if that book would be found around the shelves. She looked through three rows of shelves before she finally found the desired book, between a smaller book and an empty space. With a victorious smile, Anna extended her hand to obtain her prize, her (assumedly) lovely story of fiction; poetry hidden behind every word, philosophy that only gets deeper between every chapter. Were her expectations too high? Perhaps. But she couldn't help to feel excited.
...However, just as she touched the book and began pulling it to her direction, she felt a force doing the opposite, pulling it to the other side of the shelf. Anna looked through the empty space behind her book, and saw something she hadn't seen before. More specifically, someone. Perhaps she wasn't there before, maybe Anna was too absorbed in her own thoughts to realize. But the fact is, there was a girl who also picked the same book at the same time as Anna, and she looked taller and stronger than the second-grader. The little Blackberry still did not let go, and instead threw a dirty look, as though only she could choose an intriguing book during free time, and although it did waver looking at that girl's shiny hair, still Anna spoke, with more firmness than asperity:
"You can't pick this one. I already chose it."
Ah, yes, gatekeeping. Truly the loveliest, most adorable behavior of all.