Gregor's rival leads a faction of Vampires who uphold their traditions, such as living underground and keeping their existence a secret to the outside world, whom they don't trust. They simply want to live in peace. The group was united until Gregor formed a faction and invaded Lupusville.  The Ghostbusters were hired under false pretenses to bust the rival and his faction.
During the skirmish, one the Vampires set off the self-destruct switch on a Proton Pack. Gregor kidnapped Egon Spengler and Winston Zeddemore during an explosion, Peter Venkman and Ray Stantz met the other leader. He made an uneasy alliance with the two. The leader threatened to kill Peter if Ray zapped any of his comrades. The two vampire leaders were last seen in Lupusville, fighting each other.
- On page 10 of Ghostbusters Issue #3, Gregor's rival makes a non-canon cameo on a poster.
- On page 9 of Ghostbusters Volume 2 Issue #12, Gregor's Rival makes a non-canon cameo on a Times Square ad on the left side.
- ↑ Gregor's rival (2009).The Real Ghostbusters- "No One Comes to Lupusville" (1987) (DVD ts. 12:05-12:23). Time Life Entertainment. Gregor's rival says: "Once we were united under my leadership. We shunned the open towns. Then Gregor, his followers, his servants invaded Lupusville, capturing all who lived there. They grew tired of the old ways that have protected us. They risk exposing us to the world."