I'm no good with designs, but if I were to add some suggestions on how to spice up his design, I think he'd look good with a bandana, perhaps to compliment the mantle. Just a hunch.
Something like what Luna has going on:
But maybe not wrapped around his entire hair like she does, and worn in a less girly style.
Either way some sort of head accessory to compliment the mantle might be a good idea. You have a good design but it's rather on the plain side, not that I can do much better. XD
Maybe a bracelet of some sort could do some good, too?