Mia 'n Selvia - character designs

I haven't really updated Mia's and Selvia's actual designs since..2011, so here is a very all-inclusive ref sheet I recently made for these babes! I have been doing  more and more writing for them last summer, so naturally there are some world and story building illustrations still coming up as well. These refs are a collection of different drawings and sketches I did of Mia and Selvia for fun the past half year, the most recent one being the one in the right lower corner. Making refs really helped me settle down on their outfits and general aesthetic, but also realize that I want to do something big with these characters these days. I originally intended to just print an artbook once I had enough illustrations, but there is way too much story for that by now, so I don't really know what medium I should use to tell it. So my question to you, my dear follower:

Trough what kind of medium would you like to discover Mia's and Selvia's story?
A written book? A written book with illustrations? A comic? A game? A full length animation movie?
Trust me when I say I have considered all of these and more, so you tell me what you think!

_{Lots of love, Tosca}
also on tumblr