Jan Pieterzoon is the signature character of the Ventrue clan in Vampire: The Masquerade. He is an idealist who believes that the Camarilla should embrace change, evolve and adapt to the new millennium. If it does not, Jan fears that the Camarilla will crumble and face a self-fulfilling Gehenna. Thus, Jan is on a book burning crusade, prompting the Inner Circle to punish all references to the Book of Nod since such references feed apocalyptic fear gripping Kindred society and making it harder for the Camarilla to remain dominant.
Jan suffers from a extreme case of the Ventrue Clan's weakness in that he can only feed from rape victims. After being ambushed in Washington DC by Sabbat his entire herd is wiped out and though he is saved by Theo Bell, he has to use his dominate powers to cause a rape and then again to erase the memory of it in the victim in order to feed after the loss of his herd.
- Gehenna, pg. 236, 237