["Courteous" she says, when he's the one that apparently murders her. He almost scoffs at that.]

I get it. [As much as he'd love to go sock him in the face, he doesn't want to provoke him either. There were others to think about - not just Luna but Gladio or anyone else he decided to care about here.]

I'm not planning on picking a fight with him. He already stopped me from getting in his face once so there's no point.

[That was before he even knew he'd killed Luna. He still wanted to pick a fight with him about it, but he's trying to keep a cool head and just think for a change. Act like a King, as it were.]

What did he do to your friend?