Monica » Slytherin
Monica is competitive, ambitious, resourceful and very determined. She loved winning "now you’re marrying me you don’t get to win anymore" and she won often. When faced with a task she weighs the pros and cons (and maybe brings out her label-maker and colour coded charts) rather than recklessly jump head first into it, and when she wanted something bad enough, she worked hard and she achieved it (became skinny/head chef).
Rachel » Gryffindor
When we first meet Rachel, she has ran out of her wedding, thus escaping her old life. A complete daddy’s girl with no skills whatsoever, she throws herself out there and gets a job. She was brave to the point of recklessness; speeding along in a porsche with no valid license barely stifles a yawn from her. And then, when faced with the decision to either get rid of a baby or become a single mom and face many hardships, she doesn’t even seem to think there is another option except the hard one.
Joey » Hufflepuff
Joey Tribbiani is all heart. He is incredibly loyal to his friends and is protective over them. When he thought Phoebe was going to be a single mother he proposed to her, not wanting her to face those hardships alone. And of course, if Joey were in Hogwarts he’s going to want to be in the house whose common room is right next to the kitchens!
Ross » Ravenclaw
Probably the easiest to sort, Ross is very intelligent and very witty. Ross doesn’t need any words to be funny, he can make you laugh just from a look. He is a professor, when he was growing up he achieved almost all As (darn gym class!) and he was the golden child to his parents. He may bore the gang with his rambings about
dragons dinosaurs, but he sure knows his stuff.
Chandler » Gryffindor
Chandler had a lifelong battle with commitment, and it almost seemed like he would never find the one for him. But when it came to Monica Geller, he was strong, he held it together, and yes, he may have crumbled at times, but he would get back up again every time to be there at that wedding where he stabbed his commitophobia straight in the heart. He had the courage to quit his job and pursue his dream career, but with Chandler Bing, there is a fine line between bravery and stupidity, and apologizing by proposing probably wasn’t his greatest decision.
Phoebe » Hufflepuff
Phoebe is cheerful and friendly, and doesn’t really make a big deal about her rough upbringing. She is kind, even to someone who might have been stalking her for a few blocks, and loves to help her friends, even if they can’t speak French to save their lives. Fairness to all creatures is important to her, thus you will never catch her eating meat (ok, maybe the odd cheeseburger…) or wearing fur (ok, maybe that one time…).