[as soon as he notices Axel isn't bothering to deflect his strikes, the blond stops.] What are you doing!? Defend yourself! [his tone is noticeably panicky one. Seeing the darkness leaking out of the nobody makes him feel guilty- he got angry and deliberately hurt Axel.
After a pause, Wolfram cools down and puts his sword back in it's sheath. See Axel? Emotions are a pain. They cloud your mind and make you do stupid, regrettable things. Why would anyone ever want something like that?]