Now that Coco had successfully completed her first term at Hogwarts, she could safely say it wasn't entirely what she was expecting. She had expected a fun, carefree atmosphere where she could make friends, learn magic and have an outlet for her energy - instead, she found herself in some sort of prison ruled by a pink toad faced woman.
Either way, Coco didn't want to let it bring her down - and now it was cold in Scotland, it was snowing, and Hogwarts grounds looked all pretty, frosty and white. After class, she couldn't get out of school quick enough, especially since her last lesson had been Defense Against the Dark Arts which was beyond boring.
All wrapped up in her Gryffindor hat and scarf, she made her way down to the lake, which had frozen over. She picked up a big stick and started tapping the lake, to make sure it really had fully frozen over.