This is the super-duper secret sketch from the previous sketch batch, and an old OC (ahem Sweetie Belle recolor cough) from a long time back named Monochrome. Now she's back, revamped and with an actual career. She's a newspony now.

I actually ended up using Paint Tool SAI for this instead of my usual Photoshop, as I'm planning on switching pretty soon. The only thing that gave me a little trouble was the shading.