Little Girls Treehouse

I decided to make Greyscale for something different, and to suit my actual comic/manga art. The original idea was to have Uran (Astro Boy), Kiki (Kiki's Delivery Service) and Zia (The Mysterious Cities Of Gold) but I decided to stick to the 'Western' characters. 

So from left to right, Gwen Tennyson (Ben 10 original series), Lisa & Maggie Simpson (The Simpsons), Louise Belcher (Bob's Burgers), Helga Pataki, (Hey Arnold!), Bubbles, Blossom & Buttercup (The Powerpuff Girls) and Ben coping one in the face... 

Critique welcome...