[ When Peggy grabs for Cain, it seems to be with an iron grip. No matter what Cain tries, he isn't able to rip himself free, and Sora is there to witness how quickly the interaction devolves into something violent. It's as if Cain has gone berserk, a far cry from the laidback (yet foul-mouthed) person that Sora had met before.

When Cain shoves at Peggy, that's when Sora rushes forward, placing himself bodily between the two of them as his Keyblade is summoned again, held horizontally with both hands in front of him as a barrier of sorts. ]

Cain, please, we're trying to help you! Turning on us isn't going to fix anything.

[ Sora doesn't try to make physical contact since that's only going to set Cain off even more, but he knows they need to find a way to snap him out of this. It would be easier if he knew him better, but even Peggy isn't having much luck. ]

If Fitz and Markus don't get to see you again, how do you think they'll feel?