Kai's combat abilities didn't come completely out of nowhere though, I do remember them making allusions to him being a prominent member of the local gang, during the exploits of which he presumably became close enough to the Ojou for her to become attracted to him. We finally got to see where that minor character build up resulted. Admittedly, he's been pretty incompetent until now, but remember he was fighting things that were not ordinary humans, like here once more.

I'm hoping Saya and the bunch can help out Irene, she's really been one of the more interesting characters so far. I couldn't care less about the rest of the Schiff.