Do dragons keep their abilities when they change to human form?

[Olive]

Maybe try Nystul's Undetectable Aura?

Couldn't find it in the SRD at first. Damn that product identity spell naming issue!

Unfortunately, a dragon doesn't count as a dragon as in "Target: Object touched weighing up to 5 lb./level"

I suspect this is an oversight in the nondetection description, rather than a design intention, but it's interesting...

Have her claim it's an Endurance spell or some other Transmutation effect. Nondetection may protect her from True Seeing, of course.

It would be interesting to see if they picked up on the strength of the aura. kinda fun.