Rebecca is a vampire and the only girl in the Mickelson family, also well protected. But she's got a secret, she's married to Klaus's best friend Y/N Black. Y/N Black has been with the Mickelson family for a few hundred years, only married to Rebecca for 50 years.

Rebecca and Y/N hide their marriage because they are scared to tell her family, but neither of them know. They don't mind it and approve of it. Y/N is a vampire and werewolf hybrid, like Klaus. Hints why he is Klaus's best friend.