For Darkarax's "Alter Ego" challenge, here's Saiunkoku's Eigetsu To (rear) and his alter ego, Yogetsu (front). Yogetsu is some kind of mythological/supernatural being that resides inside Eigetsu. The violently different persona only comes out when Eigetsu drinks alcohol.

Hope you like it!

Program Used:
Photoshop CS5

Image Credits:
Yogetsu & Eigetsu -- artwork by Achiru-et-al on DA

Fonts:
Tw Cen MT Condensed