From what I can tell, Waru kinda blends into the background just a bit (I can barely tell he's there by his gold crown), just make him pop out a bit more, just like the background characters you see in Guile's stage in Street Fighter II, as an example. They are there, but they also don't stick out like a sore thumb or blend in with the background, kinda like Waru is doing here.
To make it a bit more unique, throw in some extra frames as if he pokes his head out to watch his foe get mercilessly beaten, only to have to rush to the bathroom because he drank a bad shake.
To make it a bit more unique, throw in some extra frames as if he pokes his head out to watch his foe get mercilessly beaten, only to have to rush to the bathroom because he drank a bad shake.