Wow, 3 new characters introduced (Hyouka, Sherry and Yomikawa), and there's only 3 episodes left.
Though only Hyouka left any impression on me, she's just too adorable.
(Not to mention revealing her bra just etches her further in my memory. *nosebleeds* )
Sherry, despite her brief experience, turns out to be quite a badass. I also recognized her voice as that of Watanabe Akeno's, another cast from Shana (Tiamat). Code Geass, Negima and To-Love-Ru fans will also recognize her as Villetta, Negi Springfield and Rito respectively.
Yomikawa's screentime is too short for me to have any comment.
As for the recurring characters:
Aleister Crowley - Didn't do much, besides pulling strings from behind as usual.
Kuroko - You go girl! Managing to get Biri-biri to rescue you so you can take advantage of her breasts.
Aisa - Surely you must have realized your existence is
hardly noticed by anyone, including the audience, no?