I like the character's nickname.
One thing: in fiction, there's no such thing as a normal joe. We only say "normal joe" when we aren't paying attention to the details of the character. If you write a psychological thriller, you have to, as the name implies, explore the psychology of the characters. You can put any killer you want in the villain helm, but, unless you give it depth, which will take a careful and detailed understanding of the characters, it will fall flat.
In terms of depth, Death Note and Monster are great examples to follow. (I've not actually watched Code Geass, ashamedly.)