Hope was not Klaus Mikaelson's only daughter. He also had a younger daughter named Arianna- Hope's half-sister. But this child wasn't Hayley's daughter and Klaus faced a difficult decision: upset everything just for his siblings to know a niece that didn't want anything to do with them, or keep her from them completely. He should have remembered no secrets can stay buried forever. AN- So for this story, the characters who died and didn't die in tvd or to doesn't matter, I kind of changed them to make the story more interesting and to make more sense.