Has anyone a scan of the sketches from volume 1? I find it really interesting.
I'd post a photo taken with my cellphone if you wanted them all together from the official Kazé volume [I once raped a manga with a scanner- it wasn't too pretty. I'd rather take photos.].
About the group-picture sketch:
Compared to now, Konekomaru was a freaking giant. Or at least it feels like it, since he's even a tad taller than Izumo. However, Yukio looks shorter and Shiemi is taller. Everyone's height does look off. Especially Mephisto's.
~ Bon's hair is cool. How does that work?
~ Izumo's expression looks haughty- going from tsundere to alpha-bitch.
~ Shima looks like a rapist.
~ Konekomaru's face. Just... what.
~ Takara as a girl is kind of cute. And is that a huge flower in her hair?
~ Mephisto looks so elegant here.
~ Paku's eye-size makes her look more adorable like this.
~ Kuro is a Coal Tar's forbidden love-child with a Pikachu.
~ The not-there boy is totally cute!
~ The not-there girl looks like a snarky megane-girl. And like she's sleep-deprived.
~ The skirts look cuter with the ruffle-petticoat-designs.
For the other sketches:
I really, really love Shiemi's initial design. She wouldn't have been as cute as she is now, but I think it's really, really beautiful.
... Is Shura smoking a pipe? Err, and she looks strange with a bra her size.
Is the top-row middle picture Yukio? If he is, then I like that longer hair a lot better. And that smile... dear God. If he'd look scruffy like in the Volume 1-stuff... nah.
Yeah, early!Yukio was a real wuss. It can't be practical chasing things for a living when you start wheezing under stress and topple over when seeing blood. 
At least no one would have to worry about the MLG little bro.
I would have liked to read that story though. It's a shame she didn't write it. It actually sounds different enough to make an interesting manga all of its own.
It'd be strange reading it with the same names and all, though. At least to me. But whenever she finishes AnE, Kato might as well make that a short series. Kinda like a "coulda been, didn't do".