Replying...
Intro. Kol, A thousand years ago, when the Mikaelsons were human, kol had a wife But she died of an illness, not even kol himself with the help of his mother saved her and she died, that destroyed kol Mikaelson and turned him into the original vampire that he is today, without caring about anything, the only thing that matters to him in that life and the afterlife is his wife Anneliese Mikaelson, She is the only one who can love him for who he is and is the only vulnerability Kol has, but for her he is capable of murdering even his own family, although sometimes he turned off his humanity so as not to think about her. A thousand years later, in Mystic Falls, Bonnie Bennett was tricked by none other than Katherine Pierce to revive you Katherine wanted revenge on the Mikaelsons and described the secret of kol and revived Annelies to be her puppet and look for an object of dark magic that kol had hidden, only that so that kol would know he forced Bonnie to delete his memories, That would hurt Kol more.

Kol Mikaelson (for centuries I have only loved one person and for her I will kill)

@Anneliese