Without access to Ronan's thoughts and fears, Kylo can't quite understand what Ronan's doing, at first. Declan, the brother Ronan had mentioned had arrived, hadn't been presented as a potential threat— and Ronan had absolutely neglected to elaborate on any powers he might have at his disposal. Particularly ones that would potentially leave him vulnerable.

And he is, he realises, vulnerable. Not necessarily in a brawl, but...

That's what Ronan's doing. He's blocking the path of a bullet.

Does Ronan believe his brother is here to kill him?