The spoiler said she was the junior not the other way around..am I tripping or what..??
It was funny how Shin was denying of Kyoukai appearing in other battlefield but as soon as he said Ton Tan he was convinced it was Kyoukai. lol Also, this chapter showed us how HSU is functioning as an individual Unit with their own intelligence to scout the battlefield and making decisions on their own.
New girl seem to be evil from the looks alone. As many have already pointed it out, Houken hosted the God in him and after his death it might have chosen Kyoukai as a Host since she is into such thing. The new girl might be here to take the God for herself.