He wants to apologize, but he also wants his own feelings to be understood.

Desire to apologize: 20% / Desire to be understood: 80%

He thinks both are at fault and should just apologize already. He'll help out but won't meddle too much.

He's cooperating with Nirei, but he's troubled, thinking "You're both in the wrong, aren't you?"

He's desperately trying to think of a solution alongside Tsubakino and Hiiragi so that Guest and Umemiya can make up.

He doesn't want to get involved because it gives him a stomach ache, but since it's getting dangerous, he's discussing it with Tsubakino to help.

He thinks it's Guest's own problem so he won't meddle, but he'll use eye contact to signal what should be done.

He's watching over the two with a warm gaze, hoping they can reconcile. He's thinking up and trying out various methods.

He thinks Guest should absolutely apologize to Umemiya, but since it's a personal matter, he won't interfere.