This is positivly gorgeous! You did a very nice job on this using a lot of different textures that work well for Prussia- especially since he's a Nazi. Honestly, you're doing well on a lot of things with your work. Your strong points definitely are clothing, physique and coloring/blending. However, I'd work on your expressions more (as do I- You're not the only one) and I'd like to see more coloration on the furniture.
But other than that, very lovely! Thank you for sharing this art! O UO (I'd put in the stars for like... originallity and what not but this is fanart... so it's difficult...
Five godl stars for you!)