The best part about the ghost girls possessing the bikini armor is that they are extremely expressive. With a lack of anything other than modesty, they have to use gestures and bodily movements to express anything. Especially when the one was holding her bikini bottom while cross legged; that was VERY interesting.
Also, a pencil that was slightly different from the norm was enough to send his father into a blind rage? What is with Japan and awful parents?