Quote Originally Posted by Buffalobiian View Post
Interesting idea, though it seems that her attack was activated by Kanade herself.
Exactly!
You just have to go frame by frame and you'll see that RedKanade is summoned by Kanade the same way she does with her handsonic.

While jailed, Kanade explained Yuzuru that Handsonic was a defensive weapon.

I guess that RedKanade is the offensive Kanade.