The characters were very childish (they're like 12 in the anime and 16 in the game or something) and sometimes they were unbearable - Bouquet (the hippo girl) was incredibly frustrating and the primary reason why the character score is a 4. Her only use is in the second season and even then she's still annoying and pretty much useless.
I do however absolutely love the plot and the whole shadow concept, words can't describe how unique and amazing it is.
