Disclaimer: I don't own Star Wars

"The Emperor has decided that my dreams carry some relevance. We both believe that I have a sister." Luke told his father acidly. It was the first time that his son had spoken to him in over a year.

"Sister?" Vader asked.

Darth Vader stormed into the entrance of the rebel base. The fools thought that they could hide on the desolate planet Hoth. It had only taken a minimal effort to find them.

"Imperial troops have entered the base! Repeat: Imperial troops have entered the base!" A voice called out on the base's over speaker. It was eventually muffled when the storm troopers found the rebel using it.

"My lord, it appears that mosts of the rebels have already escaped. Nine of the launches were successful in slipping passed the blockade." A nervous lieutenant reported to the Sith.

"Twin sister to be precise." Luke remarked.

It took Vader a few moments to process the news. Luke was all but lost to the Emperor now. His master had completely turned the youth against him. His son was a monster, twisted and unreachable. To learn that he had a second child hidden away brought both relief and pain.

If he could somehow find this estranged daughter then maybe...

"Who?" Vader asked eventually.

Luke smiled nastily at him.

"Oh you're going to love this. Its the rebel senator, Princess Leia Organa." Luke sneered.

Stretching out into the force, Vader was relieved to sense that she hadn't left. Yet.

"Have the entrances been sealed off?" He asked. The lieutenant quickly nodded his head.

"Y-yes. As we speak they are being sealed." He stuttered. Vader marched passed him having lost his patience. He only had one chance to find her. Her presence burned brightly in the force, just as Luke's once had, before the emperor corrupted him. Now was his chance.

Heavy blaster fire from a narrow passageway caught his attention.

"Sir, we believe that a small group of remaining rebels have barricaded themselves in the east corridor." A commanding trooper announced.

"The emperor has decided that it would be better if you brought her in." Luke's tone made it clear that he did not agree with the idea.

"And the Emperor thinks to turn her?" Vader asked incredulously.

"Yes. I would rather her death, she's too much of a threat but the emperor wants to test her first." Luke growled.

The Imperial walkers above the base caused snow to collapse in several areas. The east wing, where the rebels had barricaded themselves was completely crushed. Vader reached out worriedly, but none of the lives slipping away were that of the princess's. For the time being, she was still safe.

"If it continues at this rate, the rebels will be buried alive." The trooper commented. It was clear that the man thought his job had been taken care of for him.

"No, commander. Make no mistake. I want every rebel accounted for. Several officers assume too much and it costs them their lives." The trooper saluted and left.

Vader turned away from his son, unable to look at him.

"Does she know?" He asked eventually. He felt rather than saw Luke shrug.

"Possibly. The emperor doesn't think that she has had any prior training so it is unlikely that the Jedi told her anything. But, if she's having dreams like I am, there is a chance."

Vader closed his eyes and allowed an image of the princess to flow into his mind. How blind and foolish he was! The answer was there, as plain as the day. He had encountered the fiery princess on several occasions. She was the spitting image of Padme and had inherited his own ruling temper. But he had been too preoccupied with Luke. Raising his son left him too distracted to ever think of the possibility that there might have been a second child.

An ice glacier fell off in the distance. It would have been of no consequence, if not for the distinct feminine scream that followed. Vader honed in on it.

"Sir, that part of the base hasn't been secured yet. Please allow a squad to accompany you." A brave storm trooper asked. The man was terrified of facing him but he was doing what he thought was right. Vader made the mental note to have him promoted. There weren't very many men brave enough to face him.

"You will stay here until otherwise directed. I must go alone." He man nodded and directed the squad to stand down.

Vader marched down the icy corridor with what he barely recognized as apprehension. He had no plan and no way of knowing what the outcome of meeting the princess would be. He was never very good with words and he knew she already despised and hated him. A brief onslaught of images of him interrogating her aboard the Death Star came to his mind. He knew that there was no way that she would come with him willingly. She would kill herself out of spite if she knew he wanted her alive.

He felt his son reaching out and testing his power.

Vader wanted to take pride in his son's growing force skills. But there was only bitter regret and a deep sadness. The emperor had taken away his heir and had made him his enemy. The raw power that Luke had inherited from him the emperor had now bent to serve his own purposes.

He felt Luke draw back and he knew his son was displeased. The youth had grown well into his skills but he was still outmatched.

If Luke tried to fight him, in his present state he would still lose.

The corridor branched out into a large hangar. The cargo exit or what he assumed was an exit had been completely sealed off. There was no one in sight. Through the force, Vader was pleased to sense that the princess was alone.

Deciding that the direct approach would be the best. Vader called out,

"Don't be coy princess. I know you are here." He could feel her fear and anger rolling off in waves but there was no verbal response. He thought about exposing her hiding place but decided against it. He just needed her to listen.

"Leia, this is important." He paused, trying out the name. He couldn't recall every saying it...

Vader forced himself to focus and continue.

"The emperor has taken a sudden interest in you. He believes that -" Vader's throat suddenly closed as his emotions fought the better of him. Reaching out into the force he calmed himself. He knew she was listening intently now.

"He believes that your have the potential to become a powerful force user like my son. You have inherited a great power just as Luke has." A brief pain flared up and it took Vader a moment to realize that it was coming from the princess. Only then did Vader remember that she had been friends with Luke in their youth. The bright, blue eyed boy that had made her smile was long gone. Vader could only imagine what she thought of Luke as he was presently.

"How does Legious sound to you, father?" Luke asked casually. Vader turned to look at him questioningly.

Luke's cold yellow eyes pinned him in place.

"For a Sith name, I mean. The emperor advised that I choose one to be ready for after I defeat you." He taunted.

It still hurt, oh he thought he would recover but the wound would never heal. The boy hated him plain and simple. There was no disillusion to what the future had in store for them. They would face off and fight for the rightful place as the emperor's apprentice. Only one of them would come back alive.

Vader turned and walked away.

"I have been ordered here today to come and collect you. Only I - the force - has shown me that it would not be a wise decision." He almost revealed her parentage to her then but fought against it. He needed her to be strong when Luke came for her. She needed to know the truth but he had to choose his words carefully.

"Luke is all but unreachable to me now. But there is still good in him."

"The hanger is just up ahead, commander." A distant voice called. Vader clenched his fist in frustration. Someone must have ordered the squad forward. If Leia was found then Luke would be lost forever.

Striding forward quickly, Vader drew his lightsaber and cut a small portal into the snow. It was small, but the princess would probably be able to fit through it and escape.

"He will come for you, and he will be angry. You need to be prepared. Run and hide. Only meet him on your terms. Don't let him catch you off guard." Several footsteps of storm troopers echoed off the icy walls. Vader knew that his time was up.

"You must do this. I cannot reach him anymore but maybe, as his sister, you can." With nothing left to say, Vader turned back and headed down the corridor. The storm troopers needed to be intercepted if Leia was to escape.

Briefly he wondered if the princess would deny the truth. However, the sound of her anguished cry told him that she believed.