[quote=Doctor Belasco]
So, I got bored and my exam revision did itself (conveniently) so I had time to play with Photoshop. If any character names or appearances change, I stop loving you.
[/quote]

I like them! But I'll be honest, I don't like the font. The only visual tweaks I'd do, is remove the (crotch shot) for Nym and change the green square for Dale, to her mouth. Pretty close to the point for all of them. I like Dale's, it's perfect, it matches her bubbly personality! 
I'd go with these font types though:
[url=http://www.fontsquirrel.com/fonts/Good-Foot]Nym[/url]
[url=http://www.fontsquirrel.com/fonts/Jinky]Dale[/url]
[url=http://www.fontsquirrel.com/fonts/daniel]Lydia[/url]
[url=http://www.fontsquirrel.com/fonts/Eraser]Grant[/url]