What do you think would happen if your favorite character each school/slice of life manga/anime you follow got together?

(You can either try to figure out how old they would be at the same time, or just assume them being the same age as they are in the series even if that wouldn't be the case. I'm doing the latter.)

Character set:
"Osaka" from Azumanga Daioh
Miyabi from GA Geijutsuka Art Design Class
Miyako from Hidamari Sketch
Chika from Ichigo Mashimaro
Yui from K-On!
Kagami from Lucky Star
Ena from Yotsuba&!

I think it wouldn't take long for them to become friends. Ena and Chika would probably get cooed over, being the youngest (given the assumption). Miyabi and Miyako would likely find commonality in being fellow art students. Maybe Miyako and Yui would do a duet, or perhaps Kagami would make it a trio. Of course, if Miyako discovers that Kagami has weight insecurities, I would expect her to make a few jabs about it, even if she doesn't believe there's a problem.