y/n and mattheo are childhood best friends. she transfers to hogwarts in fifth year as a surprise. their mothers are best friends so that's why they sent all their childhood together. she saw a side of him nobody knew. she s the only person mattheo actually smiles at and really laughs. y/n is also annoyingly perfect. she s shy, unlike mattheo. has perfect scores and is very beautiful. she s a slytherin without a doubt. and maybe that's why she s not really liked by the others. they're jealous.