Interesting episode, certainly not what I expected.
Apparently Takano is how she seemed before: No deep meaning in her evil plots, just general insanity. So her childhood was the worst sort and the only thing that made sense to her was her twisted interpretation of her grandfather's idea of becoming god....but insane is still insane.
Orphanage scene was a bit strange...I doubt the other girls who escaped have any kind of role in the story. Maybe those events are why Takano enjoys hunting down the hinamizawa kids in the forest.
And is this the third episode in a row ending in Takano's evil laugh? It's just perfect. Perhaps my favourite evil laugh. :P (The main villain in Madlax still takes the cake).