Glowing Green Eyes

The vampires’ eyes turn green when they become aroused by blood. It symbolizes their supernatural and sensual nature.

Silver Stake

A silver stake in the heart is one of the only ways to kill a vampire. It represents how difficult it is to defeat a vampire.

Silver Bullets

Normal gunshots don’t kill a vampire but uploading a gun filled with silver bullets into the heart of a vampire will kill it. This also demonstrates the difficulty in killing a vampire.

Vampire blood

Vampire blood represents life; it is used to heal wounds and extend life to humans who are injured. Ironically, it is the blood of the undead that gives life.

Religion

Religion is brought into the story to give the vampires dimension and a point of comparison to humans through Bones’ explanation that Cain created the undead from his guilt over killing...