"So who is this Indigo anyway?" Damon asked as he stormed into the living room of the Salvatore mansion. His brother turned to face him as Bonnie and Elena stood watching intently nearby.

"She's an original werewolf," Stefan clarified as if that explained everything.

"As if original vampires weren't enough of a pain in the ass…" Damon snarked, his eyes bulging in that way they always did when he was exasperated. Stefan furrowed his brow. "But what does that mean exactly? I thought there were only original vampires and their mommy dearest with a penchant for infanticide," Damon questioned, apprehension creeping up his spine although he tried not to worry about it. If original werewolves existed, then Damon was right; they had far more to worry about than the original vampires. Sure, any of the Mikaelsons could easily snap any of their necks if they felt the desire, but an original werewolf… he shuddered visibly at the thought of a werewolf bite from an original. As if they didn't already have enough to worry about with Elena being a new vampire…

"It turns out, Klaus and his siblings weren't the only 'originals' to exist. They're the first vampires, but there is a first family of werewolves too," Stefan clarified, glancing over at Bonnie and Elena as he explained. "As we all know, Klaus's mother had an affair with Klaus's father (a werewolf) and gave birth to Klaus, who was born a partial hybrid until he performed the ritual with Elena's blood and became a full hybrid. By an ironic twist of fate, Klaus's biological father went on to sire more werewolves, but using a less traditional method. Papa Werewolf used his own witch and performed a ritual of his own, creating a line of original werewolves right around the time when Esther turned Klaus and the others. Since werewolves existed in the area at the time, these new werewolves weren't noticed at first. Not until they began to stand out from the others.

Werewolves were notoriously wild and easily angered, becoming more animalistic than human. However, these new werewolves were different. They retained their human side and only turned on the full moon, losing control of themselves only once a month instead of on a whim. They soon destroyed the less-civilized werewolves and became known as the originals of the werewolf 'bloodline'."

"And Indigo Lockwood, Tyler's ancestor, is one of them," Elena pointed out. "But why would she come here? What business does she have in Mystic Falls? Maybe she's here to connect with Tyler?" That seemed like a stupid idea, especially after Indigo had never been to Mystic Falls in Tyler's lifetime until now.

"Klaus," Bonnie stated simply, glancing around at her companions as if that one word solved the entire mystery. Looking back at Elena, she sighed a little sigh and explained her reasoning. "You saw the way they looked at each other at the ball the other night. They're both originals, from different bloodlines, but still. Other than his brothers and sister, Indigo and the other original werewolves (if any of the others are still alive) is the only person Klaus knows who is as old as he is. They're obviously friends, or more if the way they were looking at each other the other night is any clue…"

Perhaps Bonnie was right. Perhaps the original werewolf was in town for her old friends. Or maybe she had an ulterior motive. "Whatever the reason, I say we keep an eye on Wolf Girl," stated Damon, receiving an affirmative nod from the others.