When Jakob is rude to someone, he is really rude. But when he is nice to someone, he is ridiculous. He greets Sakura with some concern because she is looking "less radiant than usual". She was out caring for the wounded and he's concerned that she might be overdoing it. He snaps at her, she snaps at him, and they are both embarrassed by their respective displays of agitation and go their separate ways.

3.../5? I guess?