The relationship between the Original Hybrid, Niklaus Mikaelson and the cured Vampire/Doppelgänger, Stefan Salvatore.
The two first interacted with each other in Chicago at a speakeasy in 1922, while Stefan was in one of his Ripper periods. He met the only female Original Vampire, Rebekah Mikaelson, and they became smitten with each other. Rebekah told her older brother about Stefan and when they first met, Klaus knew about him and indicated that Stefan has funny hair. After Klaus learned that Stefan was a ripper, and since Klaus himself practically had no humanity at all, from the trauma of his father ruining his life in New Orleans a few years back, the two of them turned into good friends, a bond that was so strong that both Klaus and Stefan referred to each other as brothers at one point. Eventually, Mikael found Klaus and Rebekah and they had to flee, leaving Stefan behind. Klaus compelled Stefan to forget their time together. Ninety years later, they met again just before Klaus broke his curse, with Stefan unaware of their past. Later, to save Damon's life, Stefan and his ex-girlfriend at the time had to leave Mystic Falls with Klaus. The three spent some time together but after Klaus discovered that Stefan lied to him the whole time, he compelled him to turn off his Humanity Switch. Stefan got his freedom back after Mikael's death and vowed to make Klaus' life a living hell and kill him. But after he failed so many times, and had to team up with Klaus due to the forced circumstances, Stefan eventually came to recognize Klaus as an ally.
They are known as "Klefan" by fans.
Early History[]
Klaus and Stefan first met in Chicago in 1922 when Stefan was a Ripper and dated Klaus' sister Rebekah. In the beginning Klaus did not like Stefan, but this changed when Klaus discovered that Stefan was a Ripper and they became good friends. When Stefan, Klaus, and Rebekah were attacked at a bar by Mikael, with wooden bullets, Klaus knew that they were not safe anymore so he compelled Stefan to forget him and Rebekah. Klaus thanked him for showing him what it was like to have a brother once again, leaving Stefan without any memory of him or his sister.