Disclaimer: I do not own Twilight or its characters.

AN: I've seen several stories where Caius has werewolf qualities or is part wolf and I thought that it was pretty interesting. Here's me giving the AU a go.

Chapter I

Several sets of crimson eyes watched apprehensively as a certain platinum blonde-haired vampire king paced back and forth on the dais behind the thrones. He'd been going at it for over an hour now.

Aro was impatiently tapping his pale finger against the armrest of his throne as his brother continued his exasperating striding. His attempts to learn of the issue that was bothering his brother directly from his own mouth were unfruitful. He thought about uncovering the truth for himself by touch, but a single glance towards the exposed skin on his brother's hand had caused Caius to growl warningly at that method. Now they all sat and waited for their brother and fellow king to open up and express what was bothering him on his own accord.

"Must you continue on like this, brother? Pace any harder and you'll be left with shoes without a sole." Aro smoothly insisted from his chair. Caius's pace only seemed to increase at his comment. "Or grind a trail into the stone floor…" he muttered.

When Caius didn't respond, Aro impatiently shifted on his throne then slung one leg over the other. He turned to Marcus who had been gazing off into the distance with a faraway look in his eyes. The sight was nothing new, but the slight upward lift of the corner of his lip was. Aro resisted a grin. Marcus knew something.

"Care to share, brother?" the raven-haired king asked with barely concealed excitement, leaning on right armrest of his throne.

Marcus's eyes flickered over him, observing him briefly before turning his gaze away.

"That would depend." He replied smoothly.

Aro's eyebrows pressed together. "On what?"

"On whether brother Caius wishes for others to know."

The rapid pacing suddenly came to a halt behind them. Aro leaned back on his throne, not bothering to turn around to know that Caius was directing his glare on the side of Marcus's head.

"And what is it that I would wish or not for others to know, hm?" Caius snapped.

Marcus was silent but Aro didn't need to reach out and touch him to know what he was waiting for. He turned towards the antsy guards and flicked a finger towards the double doors. They all bowed then swiftly took their exit from the throne room. Their departure was quicker than usual. Caius's odd behavior really must have intimidated them.

"I'm waiting!" Caius said more impatiently. Marcus rolled his eyes.

"Yes, please do tell." Aro insisted with an eager nod of the head, earning a glare from his blonde brother.

"How fares your other half? He is restless, is he not? That is why you pace." The brunette turned his gaze to his brother who had gone stock-still. It wasn't a question. Marcus knew something.

Aro's eyes got comically wide as they gleamed with anticipation. "The beast! How fascinating!" Caius growled at him but he ignored his blonde brother and focused on the other. "Go on, dear brother. I insist that not a single detail is to be left out either." He motioned for him to continue with a wave of the hand.

Caius's red glare flickered between the two of them. "I don't see how it concerns the either of you."

"Thankfully directly it doesn't," Marcus responded with a soft chuckle. "Unless Aro acts like a cat and gets killed by his curiosity."

Both Aro and Caius were quiet as they shared confused looks with one another. It was Aro who turned away first and spoke up, more cautious than before. "I will try to bend my inquisitiveness on the matter then, considering the apparent stakes. Though might we learn what obstacles are before us that you see?"

"Don't confuse my words for ones of threatening, brother. There will be hurdles that must be scaled, yes, but not of that nature and not by the two of us. Brother Caius, on the other hand…" Marcus turned from Aro's perplexed stare to look back up at Caius.

"The news I have is for both you and your other half," Marcus said. "I assume he's listening?"

Caius gave a curt nod.

"Shortly after your pacing began I noticed the new bond thread that emitted from you. Your other half sensed the new thread before I did. I have a feeling that it will grow and strengthen like nothing I have ever seen before as time progresses."

"I've formed a new bond?" Caius inquired, his white eyebrows pulling together. "With whom?"

Tapping sounded in the throne room as Aro began thudding his index finger against his armrest again.

Marcus smiled at his brother. "You've been alone for so many years, brother. Atlas fate has made a companion for you to partake in eternity with. You deserve this more than any other I've come to know. Congratulations."

Aro's persistent tapping finally stopped as silence filled the great room. Caius's eyebrows had shot up his forehead, his face frozen as he stopped midway during a breath.

"You don't mean…?" Aro inquired only to pause when Marcus reached out with his palm upwards for him to place his hand in. Aro's face slowly lit up, the corners of his lips pulling higher and higher that they might crack from the size of his cheshire grin.

"Oh, my," he whispered, his gaze far away. "How exquisite. Never have I seen bond colors quite like these. I pity that Caius isn't able to see their splendor."

"Yes," Marcus agreed as he continued to observe the colors of the new bond emitting from their brother. "Gold and silver intertwined. They are loose like the vines on a grapevine tree, but that will change when the two meet. I am eager to see just how tightly they will thread."

"As am I, brother. As am I." Aro gave Marcus's hand an encouraging squeeze before letting go and turning to the brother that was the topic of their conversation.

Caius was still standing there with the same baffled expression on his stone face. Aro couldn't blame him. Their poor brother had been so alone while he and Marcus found their soul mates and lived happily with them at their sides. After several centuries of waiting and receiving nothing from fate, Caius seemed to have given up on ever finding his true mate. He never bothered to ask Marcus about his bonds after that. He seemed to have simply given up.

"Are you not delighted, brother?" Aro asked attentively.

Caius's eyes slowly turned to his raven-haired brother. He opened his mouth but nothing came out. Aro raised an eyebrow at the almost comical reaction.

"Am I to take your speechlessness as a yes?" he grinned. That seemed to draw the blonde out of his daze. His gaze narrowed.

"Because I choose to ignore your prying doesn't mean I can no longer comprehend words. I am not some daft human." He grumbled and Aro smirked at his victory to rile up the other.

"I would never imply such."

Caius growled.

"Does this discovery not bring you joy, Caius? Your reaction is far from what I imagined it would be to such stimulating news." Marcus spoke up, curious.

"After being alone for all these years while you and Aro found your true mates," he looked past the thrones and far past the great door. "I tried to force the idea of having a mate from my mind in order to stand the long stretches of time without her. It was easier that way, not reflecting on the possibility whether she existed yet or not."

"Prepare yourself mentally, brother. The girl will look to you for guidance when she enters this world of ours. You must be ready for her. You must seek her out."

"Where am I to go?" Caius asked.

"Well," Aro spoke up; gaining the other's attention. "Considering we never wander too far from the castle and his soul mates bonds just now seemed to have appeared…" He paused and looked over at his two brothers, grinning widely at Caius who seemed ready to rip his head off if he didn't continue. "I say we continue as we are. Obviously, she is closer now than she's ever been before. Fate must be leading her right to us."

"To me." Caius snapped.

Aro rolled his red eyes. "Yes, yes, to you."

"He is right," Marcus said. "I don't believe the timing of your bonds was random by any means. Fate has chosen now to send her to you and we must let it take its destined course."

"She is out there and you two insist I sit here and do nothing!?" Caius rumbled menacingly, his voice rising with his anger. His hands began to shake so he tightly fisted them to control the tremor.

Aro shook his head, a bemused smile already on his face. "Of course not. You still have your duties as king to uphold and…" he trailed off as an enraged roar filled the room before something large flew through the air and crashed into the stone wall.

Aro didn't have to turn his head to the left to know what the poor splinters of wood on the ground used to be. "Though now you're a king without a throne…" he muttered. Marcus snickered beside him.

The amused grins on both their faces quickly fell when Caius rounded on them, his eyes no longer red but an electric yellow. Their brother noticed their reactions then closed his eyes and took several deep breaths to calm himself and his reign in his control of the beast within. He was furious at his brothers for not letting him go out and find the girl, but he knew it wouldn't end well for anyone if he did. His other half would take control and cut down anyone in his path. The worst part was that Marcus and Aro were probably right.

"Back in the cage?" Aro asked.

Caius ran a hand through his long hair that had come loose during his fit of anger. His inner beast rumbled in agitation at Aro's words but he was in check again. Caius could feel it pacing back and forth behind the bars, ready for him to slip in control and open the gate to spring free.

"For now, yes." He sighed. "She will fear my other half. I don't think – no, I know I won't be able to keep him from her. He will want to possess her as much as I."

"Afraid the beast will harm her?" Aro asked curiously.

"I'd never!" Caius's eyes flashed yellow again, the beast responding in unison to its host.

"I do hope not. We do only get one true mate after all. What a shame it would be to accidentally kill her off. I could not imagine the guilt that'd come from the act. Horrible." Aro sighed and rested his chin on fist.

Caius looked ready to pounce on his brother before Marcus raised a hand to grab the blonde king's attention. He shot Aro a glare for purposely riling Caius up. He was going to push their brother too far one of these days, especially now that the beast was harder to control and will be protective of its new mate. Marcus had a feeling Aro was going to get bit at least once by the end of it all. He'd even wager a limb to be absent as well.

"Don't let Aro's words get to you, brother. He knows better than to jest when it comes to mates. We both trust that no true harm will come to your mate from either you or your other half. Have nothing to fear."

Visibly Caius seemed to calm back down thanks to Marcus's words. Trust Marcus to pick up and put back together whatever Aro has broken. Unconsciously he began treading back up the stone steps to sit back down on his throne before he remembered he hurled it across the room. He stopped dead in his tracks and grumbled under his breath. Aro caught on what Caius had intended to do and let out a soft chuckle.

With nowhere to sit, Caius went back to pacing behind the two remaining thrones. His other half wouldn't have let him sit for too long anyhow.