This is what tokyopop says about vampire doll:
Guilt-Na-Zan is a vampire aristocrat who was sealed into a cross by Kyouji's ancestor more than 100 years ago. Now Kyouji has revived him--although he was resurrected as a doll and can only transform into his real figure when he sucks blood from Kyouji's sister Tonae... But when you combine Goth clothes and hot vampires, slowly but surely everyone will start to feel like one big family!
Read more about vampire doll here.
Anyone else read this manga? what do you think?