Lucy Chambers, sixth year Ravenclaw. Lucy can be a little abrasive without meaning to be, she likes Quidditch more than people and is a little too honest. Its hard to tell if she likes you or not, but she generally does, you just need to ignore the rude. She pretty much ignores her.
Jules Dorny, stagnantly seventh year Slytherin and prefect. Jules is very closed off and generally hates everything. He likes to read, he likes to smoke, he doesn't like to socialise. He's permanently underwhelmed by everyone. He'll be as housemately friendly as he can be.