Quote Originally Posted by Buffalobiian
Mio's shyness works well, Yui's a born-airhead, while Ritsu's playfulness and outspoken self feels completely natural. Mugi always feels a bit off.
It could be partly intentional as she's from a super rich family and so they likely have tried to build her character so that she doesn't quite fit in, no matter how much she tries, and her attitude can be somewhat off a lot of time, like when switching a trip to Hawaii to a cheap board game.