Vamp

A sultry nightclub vampire who uses seduction and violence to feed and govern a vampire nest. She pins AJ to a blood-filled waterbed, seduces him, and transforms into a vampire before killing him with a deep neck bite. She relentlessly pursues Keith and Allison to maintain control over the human world.

Keith and AJ borrow a Cadillac to scout strip clubs, becoming entangled with Katrina's world. He turns into a vampire after the night's events and, seeking to protect Keith, drives a broken piece of furniture through his own heart. He later returns in a form that helps in the confrontation, revealing a complex loyalty to Keith.

The determined college student trying to escape a noisy dorm by moving into the frat house. He remains loyal to his friends, navigates vampiric danger, and ultimately defeats Katrina by exploiting sunlight. He survives the night and contemplates a future of balancing night school with friendship.

A waitress who becomes Keith’s ally and holds a key memory of AJ. She reveals her real name Allison and helps Keith during the escape, even as Katrina's danger closes in. She escapes the vampire threat with Keith and provides crucial information about the night.

A lonely rich student who loans his Cadillac to the trio, insisting on tagging along to scout out clubs. He succumbs to vampiric transformation and is abandoned in a burning car that explodes, marking a tragic turn in the night.

Katrina's vampire enforcer and consort who traps the group and fights to keep the undead underworld alive in the human city. He is ultimately slain when revived AJ stakes him from behind.

A lonely rich student whose Cadillac helps the trio reach the vampire night club, serving as the car that powers much of the night’s chase. His involvement kickstarts the entire night that spirals into vampiric chaos.