PAST LIVES
Parker doesn't have a belly button.
There's no records of her before the age of ten; she seems to have simply wandered out of the woods right around that age. Her first act as a member of the human race was stealing a set of slightly large clothes off a line in someone's back yard. She put the shirt on backwards, but got the pants right. When she stumbled into a schoolyard, she couldn't speak English, but by the time recess was over and one of the teachers noticed the extra kid hanging around, she was speaking as fluently as her peers. When the teacher eventually figured out that the little girl had no idea who she was, where she was, or the name of anyone not on the playground, he contacted CPS and she wound up in the foster system. That lasted about six months. During that time, she acquired a stuffed rabbit, three new languages, an understanding of doctorate-level science, and, since the Olympics were on and she liked the bendy people, a new hobby—gymnastics.
Shortly thereafter she decided that the people she lived with were boring. So she took Bunny (it had taken her a while to understand the concept of names) and visited the store for some chemicals.
Explosions were fun.
So…this one I didn't do much research on. But I was trying to think of a character that kind of came close to Parker, and I thought: Kyle XY. Kind of clueless about humanity, really fast learning curve, inhuman speed/strength/flexibility. Parker keeps showing off weird abilities in the show, like being able to tell depth by the echo of a sung note, or drawing flawless likenesses (which Kyle can do to) and predicting seemingly random laser patterns after only a few moment's watching. She also has that same sort of semi-alien cluelessness about normal human activity. I thought it kind of made sense.
