BABY MIKAELSON// Tvd
When Katherine Pierce(Katerina Petrova) was human, she was tricked into falling in love with Klaus Mikaelson. They had sex a few times, but it was only Klaus's trick to get her to be his sacrifice. They had no idea, that the doppelgänger was pregnant.
After Katherine killed herself to become a vampire, she found out there was a baby inside her, and she gave birth. The healthy baby boy was born a tribrid. Part vampire, part werewolf, part witch.
When they met the Salvatore Brothers, Katherine knew she had the perfect people that could look after her son, and left him in their care, while she faked her own death, keeping Klaus away from her son.
Corey Petrova is the baby boys name. He grew up as an adorable, yet strong man. He stopped aging at 16, and has been like that since.
This is the story of the original tribrid finding out about his family history, and what he really is, a Mikaelson.