Thousand years ago Elijah Mikaelson fell in love with woman named Astrid. They married and few years later Astrid got pregnant. She died giving birth to their daughter. While grieving the loss of his wife Elijah completely forget that know he has a daughter. He even blamed her for her mothers death. So he ignored her but she didn't care because the person she always saw as her dad was Elijah's younger brother, Niklaus. Through history, she was known as the daughter of Klaus Mikaelson. Hybrid's daughter.