A/N: This is a crossover between Buffy The Vampire Slayer and the Supergirl tv show. I'l lbe using the character of Kara Zor-El but she won't put on a costume and go by the name Supergirl. Her powers wil lbe more on par with Buffy's, and she and Buffy will wind up working together against the vampires, the demons...you know the rest. I'll be using Kara's foster parents and sister Alex. I'm not planning to use the Kryptonian villains, but, you never know. Rated M to be safe. Definite language and violence. Possible sexual situations. Not sure at this time if there wil lbe femslash or spanking references I'd rather rate it M now and not need to than to have the admins get after me for rating it T when it needs an M rating later.

Disclaimer:I don't own Buffy or Supergirl. If I did, I would be doing this professionally. LOL. I make no money off of this. The only thigns i won are any original characters.

The Slayers Super Cousin

By Dabillmann

Prologue: The planet Krypton.

Krypton was dying.

Allura Zor-El watched sadly as her husband put the finishing touches on the small craft he'd been working on. Zor had been so sure the council could not ignore his evidence, that he hadn;t started his plan B until it was too late to build a craft large enough for all three of them, Zor, Allura herself, and their daughter, Kara. As it was, they were cutting it close to even build a craft large enough for their 10 year old daughter. The ground shook violently as another quake hit. Despite their home being reinforced, debris fell from the ceiling of Zor's basment lab.

"It's getting worse,"said Zor, workign feverishly. He hadn't slept or bathed for days, in truth, he'd only eaten to stop himself from collapsing. "We'llbe lucky if we have hours." He finished an adjustment and steped back. "Get Kara," he said. "it's time."

Allura nodded and left the lab, going upstairs to Kara's room. She foudn Kara huddled on her bed, looking scared. She smile sadly. These woudl be her last moment with her precious girl.

"Mother!" said Kara as Allura walekd in.

Allura sat on the bed with her. "My Sweet One," she said. "I need you to come with me." She reached otu and took Kara's hand. The little girl took it and stood with her mother.

"I heard yo uand Father talking one night," said Kara. "Krypton is dying, isn't it?'

Allura fought tears. "Yes, my Darling," she told her. "It is. But your father has a plan." She squeezed the frightened girls hand, then kept them both steady as another quake hit. This one smaller but...

It didn't stop.

The two stumbled and made their way into Zor's labe. Kara released her mother's hand and ran to her father, who took her in his arms. "Father!" she cried. "Mother says you have a plan to save us."

Zor looked down at his daughter. Kara was beautiful, tall for her age, with long dark blonde hair, She really WAS the image of her mother.

"I do,Little One," said Zor, kissing her on top of her head. He indicated the ship. "The council wouldn't listen to me. Krypton is doomed. But, this ship will make sure the house of El lives on.

Kara looked, and cocked her head to the side, always a clue that she was processing something. "But," she said. "That ship is too small for all three of us!" Zor and Allura exchanged a grim smile. The child always had been too bright for their own good.

"It IS Little One," he said, grabbing a table to keep his balance as the groudn shook more violently. "I'm afraid I barely had time to build one with room for you."

Kara caught his meaning immediately "NO!" she exclaimed. "I won't go without you!"

"Kara, you MUST,' said Zor. "I can't bear the thought of you dying with this planet. And you have a duty to The House Of El. The house of El must live on. Krypton MUST live on. Through YOU Kara."

"But...what will I do?" asked Kara, crying.

"You will be strong, my darling daughter," said Allura, pulling her into a hug. "Be strong for us."

The quake grew stronger, causing it to become difficult for all three of them to remain on their feet. A large piece of the ceiling hit the floor, barely missing Zor. He bent over and picked Kara up. "There's no more time!" he exclaimed, carrying her towards the ship. He opened the small cockpit and placed Kara inside. Allura came up on the other side and belted Kara in. Zor pointed at a button. "Press this button when you are clear," he said, pointing to a green button. "I left you instructions." He smoothed her hair. "I'm sorry we can't go with you, my precious precious girl." He kissed her on her forehead. "Be strong Kara. I love you."

"We'll always be with you, my sweet girl," said Allura, crying as she also kissed her on her forehead. "I love you."

"Mother, Father," said Kara, crying. She wrapped an arm aroudn each of their necks, hugging them as best she could from this awkward position. "I love you! I love you both. I love you" She was still saying "I love you" as they pulled away and Zor closed and sealed the cockpit. They waved, and went into a small sealed room. Zor flipped some switches and the ship commenced it's take off.

Allura put her arms around Zor as the ship took off. She cried on her husbands shoulder.

Zor took her in his arms. She'll be fine," he said. "I'm sending her to the planet I was stranded on for a time five years ago."

"Earth?" questioned Allura. Zor nodded. The quakes grew worse, kno9ckign them both to the ground. But they never lost their grips on each other. They looekd each other in the eyes, needing no words. They leaned in, and their lips met

And then, Krypton exploded.

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Kara screamed as her small ship was buffeted by the shock waves or Kryptons destruction. The ships stabilizers took hold, and the ship accelerated, and soon, she was out of the wave. She sat there and cried as chunks of her late planet sped by her ship.

Eventually, Kara pulled herself together enough to remember her fathers final command. She dried her eyes and pushed the green button. A hologram of her fathers head appeared in front of her and spoke to her. He looked sad.

My beloved Kara. Your mother and I are so sorry we can't be with you. We know you will be strong, and make us proud.

I am sending you to a planet I was briefly stranded on five years ago. You probably barely remember me being planet is caleld Earth. While I was there, I met a man who helped me hide and repair my ship. When you near the Earth, a signal wil lbe sent to him, asking him to meet you at the spot I have programmed for you to land. Tell him who you are. I am sure he will help you. His name is Jeremiah Danvers.

Your ship is made of special materials that will dissolve once your engines shut way there will be no evidence of your origins. The people of Earth are good people, but, they are still relatively primitive, and their leaders might do terrible things to an alien amongst them if you were to be found out. I know I'm scaring you my Darling, and I don't MEAN to, but I want yo uto understand how important it is that you blend in and live as one of them.

The Earth has a yellow sun. You will find your body energized by this sun. You will become stronger and faster than humans. You will also heal rapidly and be able to fly. This is what happened to me while I was there. You're a good girl Kara, and I know I can trust you not to abuse these abilities.

When this recording ends, you will enter faster than light travel. You shouldbe on Earth in a matter of hours, a day at the most.

Please, Kara. In all your life, remember one thing:

We love you.

Kara started crying again as the recording ended and lights aroudn ehr smalll ship started to swirl.

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Eliza Danvers looked again at her husband, Jeremiah. He was being all mysterious. That silly old ham radio he never used had started beeping, and after putting the headphones on, he'd insisted they leave their 11 year old daughter Alex with neighbors and drive into the desert. They'd been here two hours, and nothing.

"WHAT on Earth are we doing here?" Eliza and Jeremiah were an attractive couple both nearing forty. He was a scientist, she was a doctor.

"Remember that thing that happened five years ago that I said I couldn't talk about?" asked Jeremiah. Eliza nodded. Jeremiah went on to tell her this amazing story about an alien named Zor-El who had crashed her on Earth and how Jeremiah had helped him to return home. She was about to call shennanigans on the story when they heard a roaring sound from the sky. She looked up and saw what appeared at first to be a meteorite headed towards the Earth. As it got closer, it took form, and Eliza nearly fainted when she realized it was a ship. The ship got clsoer, slowed, and landed. The cockpit opened and a small girl who must be younger than Alex climbed out. She was wearign strange clothes, with a sort of stylized S symbol on the chest. Jeremiah walked towards the ship. Eliza had no choice but to follow.

The shipe started dissolving behind the little girl once she had stepped away from it. Soon, nothing was left of it. The girl looekd at them, a mixture of fear and grief on her face. And something else was there. A determination to be strong. The little girl satepped up to Jeremiah.

"Jeremiah Danvers?" she asked. Jeremiah nodded his head. "My name is Kara Zor-El. I believe you knew my father."

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Los Angeles California. Six years later.

Buffy Summers sat on her bed sadly. Her parents divorce had just been finalized, and their house was up for sale. Her mother, Joyce, said she wanted to move from LA, and get a fresh start for her and Buffy. But, Buffy knew, no school in LA was going to accept her after the trouble at her old school, Hemry High. She'd been kicked out after burning down the school gym. That wasn't entirely ehr fault though. She'd been called as a Vampire Slayer a few months ago, and, in the pursuit of her duties, she'd started getting into trouble. Then, after getting kicked out, her parents divorced. Buffy blamed herself and this so called calling for that.

"Buffy?' came her Mom's voice. Joyce had been on the telephone, so the call msut have ended. Buffy stood and went downstairs to the living room.

Joyce was sitting on the couch, crying softly. Buffy got scared. "What's wrong, Mom?" she asked. "it's not Dad, is it?"

Joyce shook her head. "No, Sweetie," she said, motioning for Buffy to sit next to her. Buffy did. "Sweetie, that was your grandmother on the phone. Then Aunt Eliza. I'm afraid your Uncle Jeremiah has passed away."

Buffy looked shocked. Uncle Jeremiah was married to her Mom's older sister, Eliza. They had a daughter, Alex, who was a year older than Buffy, and six years ago had adopted a girl named Kara who was Buffy's age. Buffy, Joyce, andBuffy's father, Hank, had been to visit them several tiems over the years. Joyce and Eliza had always been close. "What happened?" she asked, tearing up. Joyce hugged her.

"I don't know, Sweetie,"she said. "Niether of them said. Grandma called me then I called Aunt Eliza. The funeral is this Saturday." Joyce looked Buffy in the eyes. "Sweetie, Aunt Eliza and I talked about it, and you and I will be staying after the funeral, and moving into their house with them. Since you and I were going to be moving anyway, we decided it jsut made sense for two newly single sisters to live and raise their daughters together." Buffy nodded. She still didn't want to move, but, if they had to at least they would be with family.

"Pack your bags, Sweetie," said Joyce. "We're moving to Sunnydale."

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A/N2: The title is tentative. It's honestly the best I could come up with. If anybody has a better idea, feel free to IM me. Hope you enjoy the story. Please, do read and review.

A/N3: I KNOW! Another new one. Trust me to keep working on the others, please. ^_^