I admit I didn't know that.
Can you provide a link confirming your words?
Just check the thread in this very section called '[HUGE SPOILERS] Datamining Thread'.
Usually the evidence should come from the side of the approver, but I am convinced by your confidence in this.
Anyway, I still don't understand why she should be a paladin. Her story could fit well with the Horizon Walker subclass, for example.