In a word where mental diseases roam around amongst humans, with their own personified form, we have Impetuosity. Not totally a disease, but rather and uncontrollable character trait. She's nice, really, she is. Then again, most humanized diseases don't come from the best roots, as most parents pray their child will be human. Only 5% of the population on earth is a disease. This girl grew up completely fine, with two loving parents and a few siblings. So... why did she end up the way she did?