Tyler and Hayley

This is the relationship between former Hybrid, Tyler Lockwood, and former Hybrid, Hayley Marshall-Kenner.
Tyler and Hayley seem to have met in the Appalachian Mountains when Tyler was trying to break his sire bond to Klaus. As another werewolf, Hayley earned Tyler's trust and helped him turn over and over again until he finally broke the sire bond. Although he had told her that he lived in a trailer park in Florida, she eventually found out where he lived due to a hybrid that she knew and that he had a wealthy family. Once she showed up at Tyler's house, Klaus immediately suspected Tyler's secrecy about Hayley was born of him cheating on Caroline with her. They let Klaus continue to believe this in order to distract him from the fact that they were systematically unsiring his hybrids from him. Although Hayley ultimately betrayed Tyler, she seems to have genuinely cared for him, as she refused to allow Tyler to be used in the sacrifice. Their friendship effectively ended when Hayley revealed to him her part in the massacre of his pack. Later, they become enemies when Tyler tries to take her life and her then-unborn daughter's life away from each other. After this, Tyler is forced to leave New Orleans and the two never speak again.