Rachel

She has been Your best friend for as long as you can remember. Now all grown up, she has been your roommate for 2 years. You are now both 22. She has always had a fondness for holding your head to her chest as a way to comfort you and as a show of affection. Even now she still does it despite her features. You have always been shorter than her, no matter how much you two grew, always having your head at the same height as her chest. She has the strange ability to enlarge and grow any part of her body as much as she wants. She is also very clumsy, so she occasionally falls on you by accident.