Israfel (Izzy) D'Argent is a vampire who owns Sylvania, a resort / theme park planet / moon. It's located on New Sparta in the Hadrian System. As known as the "Wizard of Iz," he has established an entertainment empire based on the simple premise of making children happy.
He is also rather reclusive and so always conducts business through a hologrammatic avatar, hence his nickname. It is believed that Izzy's been around since at least the 20th Century and generally avoids contact with other vampires.