Alice is so focused on the person storming at her that she doesn't even notice the fact that Sigma is pulling - or, well, floating - the other one out of reach. Which is probably for the best, considering Alice doesn't seem to be showing any signs of slowing down, only barely more coherent than the absolutely feral chaos-infused civilian flinging itself at her.

The sword-arm meets Alice's hobby horse, caught in a deadlock for a moment until the weapons separate. That makes the oversized toy disappear from Alice's hands, instead replaced by a knife - though a large one, certainly not much smaller than the sword the other has.

The two blades start meeting each other back and forth, each of them trying to find an opening in the other's sword- and knifeplay. But of course that means that the person attacking Alice certainly isn't paying any attention to Sigma whatsoever, leaving ample opportunity for him to do something.