Here is a stab at cleaning up the other lines…

“Why did the Emperor come for me? Why did he want to kill a child? Tell me.”

"Because you were a threat to him once his spirit claimed another host. All his clones were… Rey, you have his power. You are a Palpatine.

"The sole reason for your creation was to be one of his vessels. But what Palpatine doesn’t know is that we’ve become a Dyad in the Force, Rey… two that are one. Together we can end him, and finally let the past die.

(Removes his helmet)

“You know what you need to do. You know.”

“I know.”