The color for X's throne stands out and makes it feel more vibrant, the candle in the cave, so to speak.
It also makes it feel like Shinobu could blend in to the back round and rip your guts out if you dared say something wrong.
Copy X's face seems a bit chubby, and his pose seems very uncaring as he stares out the window at what looks like space.
Shinobu on the other hand seems very emotionless, perfect for a bodyguard, yet her stance is very relaxed, like no one could beat her
What I mean is, looks good.