chinese crested

You have the chance for a sneak attack - show how indespensible you are. You could discuss small house rules - like overnight guests warning might be nice in case one of you is sprawled in a dressing gown on the couch with a face mask on whilst waiting for the waxed area to stop bleeding, or working along to a workout tape with some gat guy in pink spandex. I think some things are normal in a shared house. Nothing ventured nothing gained - but dont go so far as to make her uncomfortable. You might find out living together is utter hell, and save yourself the time of dating.
If a man reduces her to tears, be her friend, get her to slip into her equivalent of a little black frock - and tell her nearly all men are bastards - and you should know because you are one - and he doesnt deserve her - take her out looking good - the things a mate would do. Can you ask for a trial basis - be honest nearer to work would be easier, but maybe a six month trial as you think her company might be worth the extra effort. If its not going to work out, you can give notice and give her time to find someone else, and if she doesnt like living with you, she can do the same. More of a long visit that isnt it? If you want to take the relationship further, perhaps an ideal time to discuss it would be then.
When she tries a new look, notice it and say something positive, give her a warm smile to carry through the day.