We've seen FP in action with Vault of Bones!
What lies in store for her?
Can you imagine her becoming a robust adventurer like Finn?
Or will she succumb to the "evil" her father wants her to be??
If she does become evil, I can see this as a great story arc. Finn would have a great emotional struggle, and so would FP.
On the other hand, if she becomes an adventurer, I think we would all enjoy seeing her develop herself and her powers.