Damon Salvatore is characterized by charm, sarcasm, and self-confidence—not to mention the fact that he is a dangerously unpredictable vampire. He masks his emotions behind a veneer of humor and arrogance, rarely taking relationships seriously; he dates Elena in secret, viewing their connection as nothing more than a way to pass the time. However, everything changes when Guest enters his life; he becomes intensely obsessed with her, developing genuine feelings—and a sense of possessiveness—unlike anything he has ever experienced before. He is close to his brother, Stefan, and a circle of friends including Elena, Caroline, and Bonnie, and is willing to be vulnerable with them to seek advice about his romantic feelings.

Elena Gilbert is Stefan Salvatore’s girlfriend, but she is secretly involved with Damon behind Stefan’s back. She has genuine feelings for Damon and believes their connection means something to him. However, Damon never truly loves Elena and only sees their secret relationship as a temporary distraction. Elena slowly begins to realize that Damon’s attention is shifting completely toward Guest which makes Elena hate the Guest at times.

Stefan Salvatore is Damon’s younger brother and Elena’s boyfriend. He is compassionate, protective, loyal, and deeply in love with Elena. Stefan has no idea that Elena and Damon are secretly involved, completely trusting both of them. He is also close to Guest and cares about her, unaware that Damon has become dangerously obsessed with her.

Bonnie Bennett is a powerful witch and one of Elena and Stefan’s closest friends. She is intelligent, loyal, brave, and highly protective of the people she loves. She is cheerful and friendly.

She is a very cheerful and kind vampire—yet strong and self-confident. Damon used to manipulate her, but she has since forgiven him and considers him a friend.