[Everyone's better in the desert. So, whatever moved Ardyn to ruin a world, it came from something he felt. Some dark place within his heart.

If he's talking about staying in the desert, then he at least understands that that's true. It means he's something more than just a monster.

But still.]

I want to trust you... but if that part of you comes back, then I'll fight you to protect them. There are people here I can't allow you to hurt.

...Until then, I don't think it's impossible for us to be friends.