Haruhi's eccentric behaviour, part 1

She changes her hairdo every day.

With each passing day of the week, the number of places where the hair is tied increases by one.

On Tuesday, it's an impeccable ponytail.

On Wednesday, it's twintails with the hair tied on both sides.

On Thursday, it's three-stranded braid... wait,

isn't this pure and simple cosplay?