Also, what if we went with blonde!spawn instead of brunette?

http://www.hollow-art.com/base/zoe-kimball

Now, she looks like a 'whoo hoo life is awesome!' Wendy. Note the right amount of beautiful and dork that make her obviously her parent's daughter, the overly cool haircut and glasses that make her Howard's and the fearless jumping into a lake my mind somehow tells me Stephanie would do if given the chance.