Jace Wayland: shadowhunter Clary first met in Pandemonium, Killing a demon Clary thought was human and threatened him to call the police. His curiosity won the best of him since Clary is not supposed to see him and decided to follow her around. He later realizes that she is indeed one of them and leads her to the institute which is where he slowly develops feelings for her. But he gets deceived by Valentine, Clary's father, Saying that they were siblings. However, in the City of Glass, They realize that they aren't siblings and were finally happy that they are allowed to be together.