At this point I think the right question is, "Are there any characters in this manga who AREN'T crazy?"
That...well...depends on the author... *sweatdrops*I swear, Ogawa-sensei and her editor sat in a family restaurant, gave an infernal smile and muttered "let's give them HELL" while working on the storyboard.(just to pull some stereotypes)
At this point I think the right question is, "Are there any characters in this manga who AREN'T crazy?"