KolMikaelson1536487

"Welcome back, it was our deaths that allowed this day to come to pass. The slaughter of innocents by the so-called hero protectors of Mystic Falls. Twelve witches, twelve hybrids, massacres performed in the name of resurrecting the immortal Silas. They risked unleashing hell on earth for their own selfish gain. And today, that's exactly what they're going to get."
Kol Mikaelson was one of the Original Vampires, born in the 10th century to Mikael and Esther. Kol was the fourth son, the younger brother of an unnamed deceased brother, Elijah and Finn, the older brother to Rebekah and Henrik and the younger half-brother of Niklaus.
The Middle Ages

During the Middle Ages, Kol was born in a small village, now known as Mystic Falls and like the rest of his family, was a human up until his younger brother, Henrik, was killed by werewolves. It was because of this tragedy that his mother, Esther (who is the Original witch), and his father, Mikael, decided to take action to protect the rest of their family. Esther decided to perform the Immortality Spell. She then gave her children wine laced with Tatia's blood and then had Mikael kill her children. Later, Mikael forced them to feed on human blood, thus turning them into the first Original vampires.
PERSONALITY
Kol is menacing, unstable and somewhat unreasonable. He can quickly go from being a respectful gentleman to direct and aggressive. When Kol is presented to Carol Lockwood, he greets her with dignity and respect, but when Damon Salvatore is introduced to Kol, he speaks to him very condescendingly. Kol patronizes his siblings often, challenging them with snark and contempt, especially Rebekah and Niklaus. He enjoys breaking rules. He is described by Julie Plec as being "cheeky". However, despite his flaws he is shown to truly care for his family as seen when he attacked Damon for Finn's death despite Finn trying to kill him and their other siblings and when he helped his sister after she had been undaggered. When threatened by Rebekah's dagger, he's even shown to be ashamed of what his family has become. He also was upset by how quickly Rebekah seemed to move on from his death when he returned from the Other Side. He has also stated his appreciation of witches, holding them in high esteem. He seems closest to Rebekah and Niklaus, though he has stated he views some of Klaus' actions as "horrors".