Something in my mind is saying that somewhere in the manga is said that you can't teleport when there are enemies nearby, fighting you or something like that. But I'm not that sure.
I have a thing for nuns and her devotion to her "god" (Kyouka) makes it strangely appealing in the same way a nun is. The slap, the end of the chapter. As Nehoha said, "she's really rising in my favorites".