Jeremy Gilbert was the adoptive brother and biological cousin of Elena Gilbert and a medium. His best friend was Matt Donovan. Prior to the beginning of the series, his parents died in a tragic car accident that Elena managed to survive thanks to a vampire, Stefan Salvatore. As a way of coping with the accident, he started dealing and using drugs but soon stopped after the death of his first girlfriend, Vicki Donovan, supposedly because of an overdose. He overdosed on pills after drinking vampire blood in the hope of becoming a vampire and being able to turn off his emotions. He did this following the death of his second girlfriend, Anna. However his attempt failed and the blood healed the damage the pills did.