Born 24 May 1992, Caroline Forbes is a close friend of Elena Gilbert and Bonnie Bennett. She is portrayed by Candice Accola. Caroline is the daughter of the Sheriff of Mystic Falls, Liz Forbes, with whom she has a troubled relationship. Her father, Bill Forbes, left her and her mother after coming out as gay. In the beginning of the series, she is shown as shallow, self-absorbed and envious of Elena. However, Caroline’s character becomes multi-layered over the seasons and she matures. During season 1, she starts a relationship with Matt Donovan.
In season two, Caroline is injured and is fed Damon’s blood so that she can heal; however, after Katherine Pierce kills her and she later feeds on human blood from a blood bag at the hospital, she gets turned into a vampire. Stefan Salvatore helps Caroline take control of her blood lust, and they start to build a friendship. After turning, Caroline also becomes closer to Elena. She discovers that she is not able to control her blood lust when she is around Matt, and thus tricks him into breaking up with her in order to protect him. When Tyler Lockwood starts his werewolf transformations, Caroline helps him deal and he starts to develop romantic feelings for her. However, Caroline is still in love with Matt and they get back together as soon as Tyler leaves town. Matt later finds out that Caroline is a vampire; feeling alienated and betrayed, he tells her mother. At first they don’t accept her, but when they realize that Caroline has retained her humanity, they soften. However, Matt still breaks up with her, due to his aversion of the supernatural since the vampire death of his sister, Vicki.
When Tyler returns to Mystic Falls, he and Caroline become closer and in the season three premiere, they sleep together. However, Carol Lockwood finds out Caroline is a vampire and contacts her father, Bill Forbes. He thinks Caroline is a monster and tries to “fix” her through torture, but she is saved by her mother and Tyler. Bill and Caroline eventually make amends, and she is devastated when he is killed during season three. Caroline and Tyler become a couple, but they break up due to Tyler’s affection for his sire to Klaus. She has a brush with death when she suffers from a werewolf bite, only to have Klaus save her. Klaus later develops an unrequited romantic interest in Caroline, and invites her to his family’s ball. At the ball, they dance and talk together and she soon discovers a soft side to Klaus. When she returns home that night, she finds a hand-drawn picture of her and a horse, from Klaus. In the meantime, Tyler has traveled to the Appalachian mountains in hope to break his sire-bond and get to continue a relationship with Caroline. Although she is unsure about any feelings she might have for Klaus, it is certain that she misses Tyler immensely. When he returns home, Caroline is thrilled and they spend the night together. They go to the 20’s decade dance together, and dance the whole night. In the season finale, Liz Forbes and Ms.Lockwood both tell Tyler and Caroline that they need to leave town in result of Alaric telling the counsel that they are supernatural. They are not excited to be leaving their friends behind, but they both are anxious to start a life with each other. When Klaus is staked and killed, Caroline is devastated knowing that Tyler is now going to die because he is part of Klaus’ bloodline. However, after she says her goodbye to Tyler, it is revealed that he is in fact being “possessed” by Klaus, after Bonnie put Klaus’ spirit in Tyler’s body. When she finds out after nearly having sex with Klaus in Tyler’s body. She and Klaus, have Bonnie return Klaus to his original body, espically since Klaus threatens to rip Tyler’s heart out.