Dayum I could actually get behind that Burbin and I’m partial to Rey Palpatine.

What you described would be perfect for Kylo to say to her in their “reveal” scene in the hangar bay.

“Why did he want to kill a child?”

“Because he saw what you could become. You don’t just have power. You will decide the fate of the galaxy… My grandfather was the chosen one. You were chosen by the Force, too. What Palpatine doesn’t know is we’ve become a dyad in the Force, Rey. Two that are one. We’ll kill him. Together. And take his fleet.”

EDIT: This way you could also keep his line “the dark side is in our nature” later on since they’re both linked to the same man technically.