I'll give you a few options.
Zoe Shadow-
This is an obvious one. For a description, read Chapter One: Waking Up. Just... yeah. I'll tell you how I imagine her after some entries.
Kendall-
He doesn't have a last name, yet. He has a short description in Chapter Two, Black Hole Eyes, if you want to search for it. But it has nothing to do with his character. He's way more awesome than just Zoe's random crush... he's a spy for the Watchmen, sent to protect Zoe.
Owen-
Yeah, well, I keep coming back to this guy for some reason. I'm posting an excerpt with his description on the "The Dream" page. So check there. I'm curious to see how he's imagined, because, yeah.
Last one!
Witt!!! Evan Witt, Professor Witt, whatever. The Principal.
His description's in Black Hole Eyes, too.
Okay... GO! Please E-MAIL any pictures you find OR post the url (web address) for the pic in comments for this post. Good luck! Winners will receive a surprise.