Ciel is Actually Bizarre Doll Theory (Spoiler Ahead)
I’m just thinking, I guess ciel's twin is really a bizarre doll by undertaker. In blue cult arc Blavat said it for "Blue Star's" shine sake. English translation turn it into pale stars, but actually it was blue stars. check it here (http://kuroshitsuji.wikia.com/wiki/Blavat_Sky). And Blue is the colors of Ciel's eyes.
and things going clearer when Blavat going back to London and said about sirius and “main course”. I guess it mean, he make a deal or just simply having something with undertaker/real ciel to collecting sirius blood. (In simply, real ciel blood type is AB)
In other side, our Ciel and his butler. Our Ciel clearly said in contract that Sebastian shouldn’t lie to him. Sebastian (probably) never lies since the first day they meet. And our ciel kinda afraid Sebastian will betraying him. So when he know something doesn’t right after agni’s death, he ask Sebastian again if he ever tell lies. Regretably Sebastian never did that.
So, that means... Real Ciel is immediately death by the cult.
Okay, I guess everyone already guessing it. I’m just trying to making sure myself that Real Ciel is not ‘living being’. Even so, my heart still shaking ;;---;;. Ciel please stop come back to life if you just wanna shaking your twin heart ;;A;; .