Jackson Jones
From Jenny Everywhere Wiki
Jackson Jones, known as the Hopper, was a villainous shifter who once attempted to kill Jenny Everywhere completely, hopping rapidly from one universe to the next and murdering every incarnation of Jenny he came across. In retrospect, Jenny thought of him as a “mad bastard” and “extremely irritating”. Though his killing spree was one of the factors considered by a version of Jenny who believed herself to be the last incarnation of Jenny in the universe, he was ultimately a minor element of how she had apparently managed to die. (COMIC: Jenny Everywhere, Signing Off)
