Amity Wills was wheeled through the door of Seattle Grace Hospital with a broken leg and possible head trauma at age 12. She had been in the foster care system since she was 3 years old, when her mom died in a building collapse. She knew the hospital for it's sadness, what does she gain in happiness? Well, she gets new foster parents for one, but that doesn't sound very interesting... but when those parents want to adopt you and happen to be Derek Shepherd and Meredith Grey? She's in for a treat.