Camille O'Connell

Camille "Cami" O'Connell was a vampire and a main character on The Originals. She was a psychology student who moved to New Orleans to investigate the death of her twin brother, Sean O'Connell. Initially, both Klaus and Marcel were attracted to her apparent physical beauty and intelligence, and thus they attempted to keep her sheltered from the major ongoing conflict between the vampires, witches and werewolves of the city. However, she eventually became aware of the surrounding supernatural world and uncovered the truth about Sean's death. 
Over time, she became increasingly involved with the Mikaelson family, partly due to her uncle's role as de facto leader of the humans in New Orleans, and partly due to her growing relationship with Klaus. This relationship, combined with the fact that she was human, placed her in sights of the family's vengeful enemies, who started noticing the important role that she seemed to play in Klaus' life and therefore saw her as an asset against him. This entanglement culminated in Camille slitting her own throat under compulsion and subsequently turning into a vampire. Klaus' former lover, Aurora de Martel, orchestrated this deadly scheme to get back at him for leaving her and torturing her and her brother. Aurora also expressed jealousy towards Camille, seeing her as her own 'replacement' as Klaus' new love interest. 
After becoming a vampire, Camille's personality drastically changed: she became seemingly more confident, determined, and even reckless and careless. As she suspected herself to have a 'darker side' as a human, this sudden shift in personality and behavior associated to her new vampirism can be seen as a self-fulfilling prophecy. 
In The Devil Comes Here and Sighs, Camille was fatally bitten by Lucien Castle in retaliation for Klaus "stealing" Aurora's affections from him. Following several unsuccessful attempts to battle against the poisonous bite, it soon became apparent that there was no cure and after tearful goodbyes from her friends, Camille ultimately died with Klaus saying that he loves her, and promising that she will find peace. 
Camille was a member of the O'Connell Family.