A/N Hello all. I don't own Star Trek or Buffy. I just like playing in their world.

1

Buffy Summers sat in her room alone. Alone and surrounded by darkness was how she has spent this day every year for the last 22 years. Across the house her sister Dawn was in her room observing a similar ritual, but instead of darkness was surrounding herself with ice cream and bad daytime television. It was a day they never spoke about with each other. It was the day that their mother died, and every year the sisters spent it alone grieving in their own way.

Buffy reflected on the years; The fallout of her mother's death, her fights with her sister having been thrust into the parent roll that she still didn't feel prepared for. Now it seemed the roles had reversed. Five years since dawn had bought this house and asked Buffy to live with her. Not that Buffy wasn't capable of looking after herself, but after the fall of Sunnydale and the hectic few years they spent rebuilding the council, training slayers, and trying to keep the world spinning Dawn just wanted to make sure that Buffy had somewhere to call home ever since they settled in Cleveland.

Dawn rolled her eyes at the soap opera in her screen. She watched Passions as a teen with her mother and occasionally spike, but as a thirty-six-year-old woman found it annoying. She groaned as her chocolate covered spoon scraped the bottom of her container of rocky road and groaned as she forced herself to get out of her bed to retrieve more. Today was a hard day and she wanted to treat herself.

She descended the stairs and made her way to the kitchen when she saw something move in the corner of her eye. Slowly and quietly, she made her way to the foyer and turned on the screen that monitored her porch. There was an older woman pacing back and forth and apparently talking to herself. The younger Summers wasn't sure but it looked like the woman was trying to psych herself up for something. Dawn made her way upstairs and knocked on her sister's door, "Buffy?"

Buffy was knocked out of her trance by the knocking and call of her name. It took her a moment to center herself before she could answer. "What is it Dawnie?" Dawn's muffled voice came through, "I think we have company." This caused Buffy to blink several times. None of their friends would be bothering them today. They all knew better. She felt her back pop as she moved for the first time in hours, and grabbed a knife as she moved to open her door.

The sisters made their way downstairs to Dawn showed Buffy the woman on the monitor, "Do you know who she is?" Buffy squinted with a brief feeling of familiarity, but shook her head. "No, I don't know her, but she looks vaguely familiar." She set the knife down on the table next to the monitor and moved to the door, "Stay behind me Dawnie… Just in case."

Buffy noticed the woman jump as she opened the door. Buffy noted she was older with curly hair; she was about as short as she was and had a slight spacey look in her eyes. "Can I help you?" Buffy asked the clearly nervous visitor. She seemed to struggle to find her voice which kind of cracked and he spat out, "Yes," in some accent that Buffy couldn't place to save her life. "I'm looking for a Buffy and Dawn Summers." She then proceeded to smile with an impish grin and much more confidently stating, "I should come in."

Buffy held out a hand as her slayer sense started tingling, "Hold on there. I don't know who you are, but I know you're not human. There're only 2 reasons non humans show up at my house. Because I've invited them or they're trying to kill me, and I didn't invite you." The woman gasped in shock at how easily the young blonde has sussed her out, but it also rang her curiosity bell. Humans weren't supposed to know about other lifeforms, but this woman called her out like it was just another day at the office.

"Well ye see dearie, It's a bit complicated, but I can promise ye that I mean ye no harm," She said hoping to get this woman to trust her. She pulled out a photograph of an old painting and held it out to the blonde, "Do ye know her?"

Buffy's eyed widened in shock and she instantly snatched the photo out of the strange woman's hand, "Mom?" With the one word the taller brunette forced her way from behind her sister and looked at the photo, "It... It can't be." Buffy looked at the woman rage beginning to show in her eyes, "Alright, how do you have this and just who the hell are you lady?"

The woman had a sad smile on her face, "My name is Pelia, I'm your grandmother."

Buffy felt like she had been slapped and stood there dumbstruck until she heard a crash behind her. Turning her head with a snap, she saw Dawn collapsed to her knees. "O… Ok, Buffy said quietly. I think you had better come in."

Pelia smile broadly, "Grand, but let's get your sister off the ground first."

Buffy reached down and pulled her sister up. In the next blur of a moment, they were all sitting at the kitchen table with awkward expressions on their face. Finally, Buffy broke the silence first, "How are you, our grandmother? A: You don't look old enough, B: You're not human, C: Our mom never once mentioned you."

"She didn't?" Pelia asked in her odd accent, "I knew she wasn't talking to me, but to pretend I didn't exist…" Buffy stood up ready to pounce, if need be, "You're not human," she reinforced. Pelia smirked, "Neither are you, well not entirely"

Buffy dropped back into her chair stunned with another bout of shock, "Dawn, call Willow. Tell we need her here now… Right now." She shook her head momentarily and looked at the woman as Dawn went to grab her phone. "Explain, now," she ordered.

Pelia smiled; her granddaughters weren't as alone as she feared. It was hard for her people to make friends. She focused in on the young blonde, "Your mother is my youngest daughter. Now, let me ask you a question. How old are ye?" Buffy looked at the woman with incredulity, "I'm 42, what difference does that make?"

Pelia laughed a genuine laugh, "There ye have it. I had no Idea ye would be so young. Your mother stopped talking to me just a few years before ye were born." Dawn finished her call and stepped back into the kitchen, "How many… years I mean?" Pelia looked to be counting, "Hardly any time at all, three maybe four hundred." Dawn's eyes went wide, "Mom was four hundred years old?" The older woman chuckled, "Goodness dearie, no. By your calendar she was a little over three thousand years old."

There was a thud as three heads snapped over to see Willow Rosenburg standing in the kitchen archway with wide eyes and a purple liquid spreading around her feet and looking like she was going to hyperventilate. "Willow!" Buffy shouted as she grabbed the redhead and pulled her over to the table, "This woman showed up calling herself our grandmother. Can you verify it?"

Willow shook the three thousand years comment out of her overactive brain, "Um… Um… Yeah. I just need a drop of blood from each of you." Pelia snatched her hand and held it close, "Now don't ye be thinkin you can do just any ol hoodoo on me. Willow looked at the woman with a creased brow, "How… How did you know?" Pelia gestured to the redhead, "I've been around long enough to know a witch when I see one, and you dearie are."

Buffy waved to get their attention, "She's just doing a test to see if you are who you say you are, nothing nefarious."

"Oh, Pelia said, "Well why didn't ye just say so?"

An hour later Buffy and Willow were sitting in her living room talking, "I don't know what to tell you Buff, I ran every test I could. She is who she claims to be." Buffy shook her head, "Fine she's my long-lost grandmother who my three thousand year old mother stopped talking to around three or four hundred years ago… Don't you see how bonkers this is? I know she's not human, but what is she?"

"Lanthanite," came the perky response from behind them.

"What's a Lanthanite?" Willow asked as Pelia came in and settled into the open recliner. Pelia thought how to say this without freaking them out, "I guess you could call us aliens, but we've been here just as long as ye humans have."

Willow looked at Buffy, "So you're part alien?" Buffy shrugged, "I guess so… and I thought being the slayer was as weird as it got."

Pelia perked up, "You're the slayer? Ye really are a special young one. A nearly immortal slayer, I bet those stuffy old shadow men are rolling in their graves" Buffy felt her spine stiffen, "I'm not immortal, I've already died a couple times." She watched her new grandmother's expression drop. It was a look of sorrow, "We aren't unkillable, we can still get sick, hurt an all that. Our lifespans measure in eons dearie, you'll probably look like you're in your mid-twenties for the next several millennia."

"Um," Willow spoke up, "How old are you?" Pelia looked annoyed, "Don't even buy me a drink before you try and get all personal," then she grinned impishly, "I quit counting around the time the pyramids went up." Dawn looked at her with a little bit of fear in her voice, "How long will we live?"

A/N: I'm hoping to see more of this crossover, but figured I would start the first one while stretching my writing muscle again.