Chamo! love his face whenever he says "PACTIO!" XD
3) Kotarou - He's so cute and badass. <3
Well, favourite girls:
1) Evangeline, and I'm hoping her to be the final boss for this series. I want to see Negi curb-stomp Fate and everyone else, and still lose pathetically to his Master... she's made of win <3
2) Chisame, for her genre savvy outlook on the series. She makes clichè stuff look funny
3) Chachamaru, for the best pactio kiss until now. I almost thougth she wouldn't make it xD
I like Ayaka a lot too, she seems to just be acting silly most of the time; I think she knows that something's going on, just won't act on it...
Male favourite is easy: Albiero! He deserves a nice pat on the back for thinking of Eva wearing nekomimi and school swimsuit.