The Vampire King
From Jenny Everywhere Wiki
In one universe, Jenny Everywhere defeated the Vampire King when he “came to town”, the year before the “Eye of Tripoli business”. This involved rescuing a bystander, Ulysses Dumas, from his dungeon. The next year, Jenny discovered that the King has successfully turned Dumas into a vampire himself, albeit a harmless one. (PROSE: Camera Shy)
Jenny also took ownership of the Crown of the Vampire King, a dangerous mystical artefact. When she and Kim went through their closet to sort its contents, they found it again, and decided to repackage it more safely. (PROSE: Camera Shy)