So I had a while to think on things and this idea came to mind so here's a story Idea I've only rarely thought about and just got around to doing it. So before I begin I've not decided pairings(at least not ones that aren't official in the timeline before the Grand Magic Games arc A.K.A Bisca and Alzack and technically Zeref anf Mavis is a decided pairing) so suggestions would be nice.
Chapter 1
Third Person POV
When they arrived back from Tenrou, they never expected as they settled in.
"Hey guys!" Levy McGarden said running up to the group of Fairy Tail mages that, behind their backs, were called Team Natsu.
"What is it Levy-chan?" Lucy asked.
"There's a new mage in town, I just heard from one of the other citizens that he met a young woman who asked if this was the town where Fairy Tail was, we may get a new member." She informed cheerfully.
"Someone here? Looking for Fairy Tail?" Erza asked.
"Yes, he said something about her looking determined." The Solid Script mage replied.
"What are you talking about?" The group looked up to see Laxus looking curious.
"Apparently there's a woman looking for Fairy Tail, maybe a new member?" Lucy said.
Laxus made to reply only for him and the other Dragon Slayers to stand all sharing confused looks.
"What is it?" Erza asked.
"A strange scent." Natsu said and the group followed the Dragon Slayers only to find a girl surrounded by some familiar Twilight Ogre members the leader of whom was a familiar young man of average height with poofy dark hair. He has a prominent nose pointing downwards, with each of his nostrils going upwards in a curved motif, and pointed, mildly rectangular ears.
"Oh, what's a pretty little thing like you doing in this part of town?" Thibault asked with his perverse gaze on her prominent bust.
"Just coming to town to see someone, if you could direct me to where Fairy Tail guildmaster Makarov Dreyar is I would be grateful." The woman said smiling.
She was around the same age as Natsu and the others. She had wavy, snow white hair with black tips that reached to mid-back, large emerald eyes, alabaster skin, and she was wearing a black coat that had a checkered pattern on the lower right side and white on the inner collar, a black skirt with white trim, a black shirt, black shoes and white socks that reached her mid thigh.
"Fairy Tail eh? A fine thing like you could do better." He said smirking.
She looked to the sun and sighed,"I'm sorry but I've got to cut this short, I can't stay in a inn and I have to get to Fairy Tail before dark."
She made to leave only for him to grab her arm.
"Come on, you could stay with me." He said his perverse grin going full powered.
"Hey, stop right there, she said she wanted to go, so leave her alone." Natsu growled.
"Beat it Fairy punk." He said angrily.
"Oh, that's one thing on the list down, now sir if you would kindly release me today will end nicely, but if you have a problem, I'll fix it now." She said her sweet voice going sinister at the end.
"Oh and what's a little girl like you gonna-" He was cut off by a ghost-like apparition which engulfed the man and he began hitting himself with his large club.
"Possession magic?" Erza said.
"So, Fairy Tail mages right?" She asked.
"Yeah, and what do you want with our Master?" Natsu asked.
"I want to join Fairy Tail just like my Oji-sama, I want to meet him." She said.
"Your Oji-sama? Meet him?" Erza asked.
"Yes, I'm meeting him for the first time today, I'm so excited." She said cheerfully.
"Well, what's your name?" Gray asked.
"I'm Mika, Mika Dragneel." She said.
"Dragneel?!" The group yelled in surprise.
"Yes, why?" She asked confused.
"I'm Natsu Dragneel." Natsu said in shock.
"Oji-sama!" She yelled engulfing him in a hug.
"Um... I have a niisan?" Natsu asked.
"Um, you don't know?" She asked in return.
"Know what?" Natsu asked.
"Papa is Zeref Dragneel." She informed.
"Zeref? Natsu is Zeref's niisan?!" The others yelled.
"Wait if Zeref is your Tousan? Who is your Kaasan?" Lucy asked.
"Papa said her name was Mavis Vermilion and she was a member of Fairy Tail." She answered.
It was then their minds broke.
"Let's go see the old man." Laxus said as the only one still coherent even if he was barely holding on.
"Mhm." She said nodding in affirmative following behind the group happily.
The group had recovered by the time they arrived back and now Gray and Erza were walking behind the newly known Dragneel, while Lucy and Wendy were on either side, all four sending suspicious glances while she animatedly talked to Natsu about the stories Zeref had told her as a kid which were actually very nice stories to hear and taught very good lessons, meanwhile Laxus headed the group leading them on. When they reached the guild Makarov Dreyar immediately noticed the formation they'd made confused by Natsu's placing but otherwise knew what it meant.
"Well well, who's this?" He asked.
"I'm Mika Dragneel, it's very nice to meet you Makarov-san." The girl said.
"Dragneel?" Makarov asked with a raised eyebrow.
"Natsu Dragneel is my Ojisan." She informed.
"Well, I didn't know Natsu had a niisan or neesan." Makarov said.
"Well, you don't know Papa but I think you know my mama." She said.
"And she is?" Makarov asked.
"Mavis Vermilion." Was the instant reply.
Makarov's jaw dropped it was then he the resemblance to their First Master, though it helped that unknown to the girl the First Master wasn't far away looking at the woman in shock, her hair looked like a shorter version of Mavis', the eyes were similarly shaped, though hers lacked the aniridia that the First Master had, she also had the same facial structure yet her nose was different, 'most likely coming from the father.' He thought.
"Um... I'm surprised and curious, did you come here just to visit?" Makarov asked.
"No actually, I was wondering if it were possible to join Fairy Tail? I wish to stay and get to know Ojisan?" She asked.
"Sure, how could I possibly separate family that just reunited?" Makarov asked, not oblivious to the motioning of his grandson's head toward his office indicating he wanted to speak to the man alone.
"Well, I need to speak with Laxus so if you would go over to Mira at the bar she'll get the stamp for you." Makarov informed.
"Ojisan, can we maybe... Take a job together sometime?" She asked hopefully.
"Sure-"
"Natsu how about you join us?" Laxus asked and soon they found themselves in the short guildmaster's office with Mavis also present.
"Oyajisan you have no idea what you've just done." Laxus informed.
"And what have I done Laxus?" Makarov asked.
"You just let Zeref's daughter join Fairy Tail." Laxus said flatly, causing the old guild master to sputter and Mavis' eyes opened wide.
"Zeref? That reminds me First Master did you know of this?" Makarov asked.
She shook her head,"I didn't, I'm not sure how she was born, but she's telling the truth, we look too similar to dismiss it and besides, I'd like a daughter." Mavis smiled at the thought.
"Which brings us to why I invited Natsu to this conversation, Natsu this girl will be your responsibility, if one thing goes wrong then we're in big trouble. Keep an eye on her." Laxus informed.
"I have to agree, but he won't do it alone, I'll help." Mavis said smiling happily.
"First Master?" Makarov asked.
"As a Kaasan, I'll take care of my daughter. In fact Natsu, I will be coming to see her later at your home." Mavis giggled.
"Fine, so anything to mention?" Makarov asked.
"Yes, she might be at least adept in Black arts and Possession magic, so it would be better to stop her from causing anymore damage with it." He said.
"Well considering her Tousan it was a given she'd know them." Makarov said.
Soon, Natsu found himself arriving to find the rest of his team looking at his niece suspicious as she spoke about how she'd been searching for him for 7 years since her father let her leave home and she'd stayed in a lot of great hotels and inns, even staying in a manor after being invited to dinner by a kind noblewoman.
"And she was beautiful, but she had this weird look she'd give me every time I spoke of home, so I haven't spoken about home to anyone since I stayed with her, though I woke up with a strange hole in my stomach, but I ignored it since it was just a minor wound." She said and the suspicious looks stopped replaced by a shocked expression.
"Anyway, I'm so glad I finally found Oji-sama, he's much nicer than Ototo-sama." She said pouting at the end, either ignoring or being oblivious to the looks she was given.
"Hey, I'm back." Natsu said.
"Oji-sama, I'm already liking Fairy Tail, Strauss-san was really nice and so is Heartphillia-san, though a blue haired girl said something confusing after Fullbuster-san caught me when I tripped over someone's shoe." She said animatedly.
"Yeah so, Mika, can you tell me about where your from?" Natsu asked.
"Well, I think Papa said I was born in Fiore but before I lived in Alvarez with Ototo-sama and Papa would visit every other week." She informed.
"So, you've got a guild mark correct?" Natsu asked conversationally.
"Yes, I decided to put mine on my left thigh and chose green as its color." She informed.
"Nice, so you wanted to go on a job together, how about the day after tomorrow maybe, just us, Wendy, and Gajeel?" Natsu asked.
"Marvell-san and Gajeel?" She asked confused as to Gajeel's identity.
"That guy over there." Natsu said pointing to the Iron Dragn Slayer.
"Sure, I see no problem with that." She replied looking at Gajeel with an unsure look.
'She says that but she doesn't look on board with Gajeel coming.' Erza thought.
"What's with that look?" Natsu asked.
"N-Nothing Oji-sama, just thinking." She said her smile returning though it was a more nervous smile than genuine.
'Could she be scared of Gajeel?' Erza wondered.
It was then Gajeel came over,"Okay what's going on? Who's this? and why was Salamander pointing at me?"
"In order, we're talking to Mika here, she's Natsu's niece, and she didn't know who you were when she mentioned your name so he pointed you out so she could see you." Gray answered.
"Oh whatever, I"m Gajeel Redfox Iron Dragon Slayer, now why would Salamander need to point me out?" He asked.
"Because the day after tomorrow, we're going on a mission, you, Wendy, me, and Mika." Natsu informed.
"Why should I agree to this?" Gajeel asked.
Only Erza noticed the relieved look on Mika's face.
"Because, you're going whether you like it or not." Natsu said, once again the nervous look was back and now Erza wasn't the only one that noticed.
"What if me or Erza were to take his place?" Lucy asked.
She sent the two grateful looks.
"Well, Mika is that fine?" Natsu asked.
She politely nodded though only the duo and Wendy noticed the veiled happiness behind it.
"Hey Natsu why don't you go get yourself and Mika a drink?" Erza asked as Gajeel left annoyed.
He nodded and as soon as he left Erza took the chance,"So what made you so afraid of Gajeel?" Erza asked and Gray blinked confused.
"It's just he didn't seem very nice nor did he seem to like he would like me, so I don't know whether I can trust him or not, Papa always said only trust those that like you as they're more likely to be kind." She said.
"You know if you just told Natsu you were scared he'd drop it and would have asked one of us." Erza said reassuringly.
"But what if he got disappointed with me for being scared? I don't want to disappoint Oji-sama." She said sniffling.
"Don't worry so much Natsu wouldn't be disappointed at you because your scared." She said.
"T-thank you Scarlet-san." She said bowing her head.
"Please call me Erza." She said.
"Okay Erza-chan." She smiled as Natsu returned.
"Here I got you some tea." Natsu informed handing Mika the drink.
"Thanks Oji-sama." She said.
Natsu smiled as he sat down and the group was silent as she drank her tea.
"Um... Oji-sama," Mika said shifting slightly.
"Yeah Mika?" Natsu asked finishing his drink.
Her stomach rumbled, "I'm hungry."
"Oh, well Mira's a pretty good cook if you'd like something." Natsu informed.
"Thanks." She said walking over to Mira.
"Natsu listen." Erza said.
"Yeah?" Natsu asked turning back tot he table.
"Mika seems to care quite a lot about what you think of her, just remember that." Erza said and Mika came back over with a large plate of food half hour later.
"How the hell are you going to eat all that?" Gray asked and watched in shock as she began eating quickly yet very much like a noblewoman when she finished the shocked group were internally sputtering in confusion.
"Whew, that was nice, Strauss-san is a great cook. I feel like sparring now." She said standing up.
"So, you wanna fight, count me in." Natsu smirked.
"Hey Flame Breath if anyone is going to test her it will be me." Gray said.
"Hey if anyone gets a new fight it'll be me." Gajeel growled.
Mika smiled,"Okay, I'll fight all three of you."
Silence reigned until Mika nodded,"I'll take that as a yes."
She pulled the three outside and a bit away from the guild hall.
"Okay, I'll do my best to show my strength to Oji-sama." Mika said smiling.
"Okay, Ice-make: Lance." Gray called out and Mika pulled her fist back.
"Shadow Devil's Dark Fist!" She yelled punching the attack down and she moved forward dodging Gajeel's version of the fist attack and then a Fire Dragon's Iron Fist from Natsu.
"Shadow Devil's Dark Stream." She said and shot a ray of shadows at the two Slayer sending them flying.
"Shadow Devil's Vortex." Mika said and created a tornado of shadows around Gray stopping the recovering mage from attacking as he was pulled in.
Just as the two slayers recovered she turned back to them,"Shadow Devil's Demonic Silk."
She released a multitude of very thin beams of shadows into the two. The trio of mages looked at the girl in surprise.
"What kind of magic was that?" A dizzy Gray asked.
"Devil Slayer Magic, it's similar to Dragon Slayer magic, except for Devils." She explained.
"Wow, you just utterly destroyed them in only a few seconds." Erza said.
"How was I Oji-sama?" She asked hopefully.
'Huh?' Natsu thought seeing her look,'Is this what Erza meant? She really cares what I think?'
"You did great, made me proud to be your Ojisan." Natsu said and noticed her joy at his words.
Meanwhile a bit away hiding was Mavis Vermilion, 'So she really does care what her family things of her? Good to know.' She thought.
Later after dark Natsu and Happy found themselves watching as the young girl stood awkwardly as she set down the last of her bag, which was a lot that she carried around easily using re-quip magic. The normally messy home now had a large pile of bags in it after Natsu and Happy had come back hours before to clean up before letting Mika in and now one part of the room was filled to the ceiling with bags.
"Wow, that's a lot of bags." Happy said.
"Sorry, but Papa made me make sure I had every possible thing I could need or want." She apologized.
"Don't apologize, anyway someone is going to be here to see you soon." Natsu said.
"To see me?" She asked.
"Yes." Natsu said and a knock was heard from the door.
"There she is now." Natsu said opening the door to reveal Mavis standing in the doorway.
"Oh thank you Natsu." Mavis said entering.
"Mika, this is Fairy Tail's First Master Mavis Vermilion." Natsu introduced.
"Hello Mika, I know we haven't met before but-" She was cut off when she felt arms wrap around her, she stiffened both from surprise that she was being hugged and shock that she could be hugged.
"Mama!" Mika yelled happily.
"Um... Mika how can you hug me, I'm a spirit, a projection?" Mavis asked.
"Well of course I can, I'm a Demon after all, of course I can touch spirits and I'm so happy I can." She said.
"Wait, you're a Demon?!" Mavis asked.
"Half-Demon yes, didn't you ever wonder why Papa made Demons of all possible beings, because he was already a Demon himself." She explained.
Mavis shook her head and smiled, she could hug what could only be her daughter with almost every feature the same or similar to her own all except that nose which she shared with Natsu and a certain black haired mage from her past.
"Mama, I'm glad I could meet you." Mika said.
That's a wrap, remember that pairings are currently undecided so suggestions will be taken.