Originally Posted by Akune-chan
Lucy from Elfen Lied.
Karin from Naruto. She isn't a little girl but she is quite psychotic.
Same with Guren from Naruto.
Haha, I was going to say Karin..
I would not suggest Guren though. She is a filler character.. >> God, do I hate filler characters.
They are fun to laugh at though.
The only filler character I liked was those people from the Village Hidden in the Stars.
The village with the cancer star and the delusional people that thought their little village with barely enough people or buildings to be considered a village, would one day be one of the great hidden villages..
It was funny to laugh at. XD
Anyway, for deviously evil girls, I second the idea of the cast from Higurashi.