Those Villain People by Mary Ngai is a digitized version of the original line art by Maksn in DeviantArt. Mary Ngai (Maksn) is a freelance illustrator and concept artist and is currently working at a US-based game development studio.
Digital Inks & Colors
Using Photoshop, I vectored out the lines and the shapes (or digitally inked and colored, as I call it) to give it a more solid and flat look.
Those Villain People by Mary Ngai
Digital inks and colors, colored in Adobe Photoshop
Here’s a quick comparison of the original line art from DeviantArt and flat colours that I did in Photoshop: