It's quite a good likeness. The only thing I might suggest would be to make the lightsaber pop a little , maybe adding a simple background element to contrast with it, or drawing it in a bit more abstract way as an excuse to get some darker values there.

Haha, I hope I'm not committing some social faux pas on my very first comment by offering criticism, in my short time here it doesn't really seem like a thing people do. But I'm a bit of a contrarian, so meh. :)

Anyway, cool drawing. I admire anyone that does charcoal well, I'm too heavy handed and messy for it, I think.

-Cheers.