Tarantula was the familiar of Phineas Evantide, the prince of warlocks.
Tarantula was a black cat held captive by a witch named Marlene Whatley, her accomplice Daniel, and their familiar, a winged homonculus named Strugala. After she escaped, she notified the Ghostbusters of Marlene and Daniel, who had created three cockroach men. The Ghostbusters blasted the cockroach men and Phineas reclaimed his cat and banished Marlene, Daniel, and Strugala to another dimension. When her master helped the Ghostbusters defeat Samhain, she helped by freeing Janine, Louis, and Slimer.