I loved the method you used to make this art. Discover new artistic styles to put into practice in his own art is, in fact, fundamental to all of us. I also really admire those artists who can do what you mentioned, and I can assure you, in my view, is going the right way.
I just loved the arms, hair and faces.
I do not know the names of the characters because they did not watch the series (here in Brazil Nick passes in time when I'm ongoing), but I think the girl of up in the position to "pose", I guess because of arm .
Outside that little detail, I really loved his art. Is magnificent! Congratulations!
Go ahead, you have the ruse!
(sorry for the bad English)