Twilight is the tech-girl. So her costume resembles the suit you wear for piloting giant robots, or when you want people in the street to think you’re a weirdo.
 
Fluttershy is like nature, naked and stripbare of pretence. Simple, without being excesive, like her boobs.
 
With Pinkie there has been no changes because I really like her design.
 
Applejack, again, no major changes made. But mostly because I don’t care about applejack. And could anyone honestly blame me? I didn’t think so.
 
For Rainbow I added a v-neckline for, eh… skin breathability!
 
And then there’s Rarity, calm down, calm down, that’s a breastplate, those aren’t big… sigh, those are big boobs. And, yeah, I though the jewels were excesive, unlike her boobs, apparently.
 
99% of this was made on paint, the remaining one percent was product of garden gnome black magic. Two other images were used as reference for fluttershy’s bust and rainbow’s face.