I didnt notice any wounds on them at all, it looked more like there was something peeling off of them which i thought had something to do with Sora's attack and the gravity since they were fine after Ikki's air control move
I thought it was ice? I remember reading along the way that they would freeze outside the tower or something, so I'm thinking along those lines. Not sure.
Trying to make sense out of Air Gear these days is impossible either way.