CC is Lelouch's "ace in the hole."

But why not an Ace of Hearts with Lelouch's chibi face inside? Creayus is clearly a fan of the Lelouch-CC pairing, so it might be a nice way to depict how she "has his heart."

Yeah this is a good pic of her too

i feel so compelled to listen to ace of spades by motorhead just for looking at this picture.