Willie
"It is a good thing... Which is why you are no use to me." 

She would say flatly and stop walking in her tracks, finally taking the time to look at Ranoa and point at his armor. 

"You can save worlds with the weapon connected to that armor correct? What would happen if that was not around and darkness consumed the world?"
Nicholas
Like the woman, he stops in place, continuing to look up to her as she speaks. A confused look marks his face under his armor.

*"I'm.. Not too sure what happens after darkness consumes a world. I'm guessing the world is destroyed entirely?"*

This response mean's he's not even properly educated in what the keyblade does. He knows it stops darkness, but not the full scope of it.

"I had only gotten my keyblade recently. Not entirely sure of the finer details yet."
Willie
"For all intents and purposes... That is correct. The world will vanish in a chasm of black as well as all of the inhabitants." 

She would go on to say and point towards one of the trees of this uninhabited island, pointing out a lone Shadow Heartless skulking about.

"All it takes is one of those to get into the keyhole of this world and it'll all vanish. One insignificant creature can change this world on just instinct alone."
Nicholas
"Keyhole? You mean like a path to the worlds heart?" 

His attention turns torwards the shadow, before looking back up at her.

"It is pretty importan when you put it like that. But, whats your goal regarding it?"