Kayla,
Overall, she's good. I don't have any big glaring issues. Just a couple minor edits.
First, her father can't be pureblood, by PA's rules now on pureblood/noncanons. We're not accepting anymore purebloods that are noncanons. So, please change his blood type to halfblood.
That being said, if her mother is a a decaying halfblood (vampire), then Adelaide's species would be half vampire (unless you're saying her mother is only a half vampire), and you should address how that affects her, if you can. (If Adelaides mom is a half vampire, then Adelaide is, by our standards, human. Either way, you need to specify that in the app.
If she is a half vampire, it will affect her a bit. For example, I have a half vampire, and for him, I've selected that he does largely try to function as a human, except where his genetics won't allow. For example, he does choose to eat with his family but he does periodically crave blood. He just is pretty subtle about when he chooses to use it. He also a bit affected by time of day. He's not good in the early morning, and he really doesn't like bright early morning sunlight. He isn't going to turn to dust or anything but it does make him really cranky. And he's at his best at night.
You should address how this affects her or her personality or her daily habits. And, as I'm sure you know, you'll have to make a magical creature claim.
Does that help at all?