From watching the YouTube video and from what you have said about Allyson, she seems like an angel living here with us on earth. I used a playful font but I still think it conveys the power you are trying to convey.
This one isn't really like any of the others I've submitted but I didn't send it the first time because after I created it I noticed that someone had a similar idea (halo over the heart/ribbon) but looking at theirs again, I think it's different enough.