[Ariel] A Princess of Heart who had yet to be awakened

It was no mystery to you that there were still pure hearts who had not awoken from their slumber. Some would continue to sleep without the knowledge of their ability until the end of their mortality. This could be due to their life not being threatened to the point of near end, or their power had been expended in a previous existence to almost completely drained from intimacy.

Only few have ever existed within a different universe and completely remained with the same pure heart. And these people you believe to be stronger than most.

The knowledge is still new, but you were certain that this particular heart could prove very helpful to you.

You would awaken the next Princess of Heart, and her name was Ariel.

A beautiful woman who appeared forever young due to her heritage as a mermaid... at least until she chose to be human.

Even so, her beauty exceeded most, as her hair glared dangerously red. Her features soft and eyes big with curiosity, you knew she would be one of the first you would have to encounter. She would be no challenge to convince, as she was surely someone who sought more knowledge herself...

It was her wedding night. The night that her purest light was threatened. You knew you would have to meet her before too long.

So you willed it, it became. You stepped forward on the cliff side, looking up to the castle as the sound of waves drew against the beach. Her window was above you as you watched the lavender drapery flail in the wind many stories above. She was definitely inside, getting ready to eventually wed the prince. But you had your own ideas, ones that would benefit the universe for the greater good. Obviously Prince Eric would disagree, but in the end it was even in his favor.

How would you approach this situation to get to Ariel?