So there is quite a bit of a time jump here...if you lovely people really want, I'll do a fic about their childhood. Oh, and here it stops following the movie exactly-I will make up details and change the timeline and such. So if you're a purist, well, stop reading. Thank and virtual brownies (but not the corners-I ate those...) to laithano, Mongoose Peasant, REDROBINS007, rollwithbutter, Cockapoo, and SapphireShelle91 for reviewing.
The four children grew rapidly. Soon enough, Kili was coming of age, Fili had started looking at female dwarves, and Fysa had found work as a seamstress. Farria still ran free.
As they had grown, the differences between Fysa and her adopted siblings were made clear. Farria, Fili, and Kili would sit together laughing and talking rambunctiously as they cared for their weapons, while Fysa would be sitting calmly and sewing. The boys and Farria would leave to train, going into the halls armed to the teeth. The sharpest weapon Fysa bore, in contrast, was a sewing needle, or maybe her scissors. The four of them still got along, there was just a divide.
One day Thorin took his sister's children for the day with the sole intent of teaching Fysa to defend herself.
It was quite an ordeal. Thorin spent a good hour trying to get Fysa to simply pick up a blade. As Farria, Fili, and Kili tired of waiting after about ten minutes, they amused themselves with some sort of knife game.
After Fysa finally picked up the blade. her siblings abandoned their game to help. But as Thorin needed time to show Fysa how to properly hold the dagger, the others worked on their own training, pitting Kili's arrows against Farria's throwing knives.
Finally Thorin had Fysa sorted and called the other three over to him. On his command, Farria and Kili demonstrated the moves Thorin called out, and Fili, the most patient of the three, worked with Fysa.
When the group finally finished Fysa headed gratefully back to the rooms, and Farria went off to another hall to hunt down something to eat. Fili and Kili went to follow her, but they were stopped by Thorin.
"I need to talk to you two," he said. "I have heard rumors that the time is right to reclaim Erebor. I will need a company of loyal dwarves. Will you join?"
Fili and Kili exchanged a glance. "And Farria?" Kili asked.
Thorin sighed and shook his head. "If we don't make it back...I need one of you to stay here, as my heir. Technically, Fili, as the oldest male, is the heir, but if all of us fall, it will pass to Farria. Because, honestly, Fysa could never be queen and the ruler our people need. Also, your mother will have my head if I lose all three of you."
"Farria will be furious," Fili pointed out.
Thorin shrugged. "So we don't tell her."
Over the next several weeks Farria found herself shut out by her brothers and uncle more and more often. As even cornering them did no good, Farria began to employ her thievery skills as a spy, sneaking into rooms before Thorin and her brothers entered, oftentimes wedging herself into the ceiling beams to watch the meetings. As hard as Thorin, Fili, and Kili tried to hide their planning, Farria kept up with them every step of the way.
Finally, the day came when Fili and Kili were to leave. Farria, her bags and weapons packed, hid outside the exit she knew her brothers would use.
As night fell, Farria pulled her coat close around her and look about nervously.
Finally, Fili and Kili exited the mountain, carrying all their weapons. As they set out Farria followed her little brothers down the slope.
As time passed Farria followed Fili and Kili through all sorts of terrain, hiding when and where she could.
Finally, Fili and Kili arrived in a quaint countryside with hole-in-the-ground houses. The people there, if they could be called such, were shorter than the dwarves, and Farria recognized them from her books as hobbits.
Her brothers approached a green door, which was opened by an upset-looking hobbit. After doing the whole introduce-yourself-and-bow thing, Fili and Kili vanished into the hobbit hole.
As Farria kept herself hidden, eight other dwarves, as well as a wizard, arrived. Finally, Thorin himself, who had set out two months before his nephews, arrived.
Farria could hear voices inside the hill, but didn't dare peer into windows for fear of getting caught.
As the night grew long Farria curled up under a buch in the hobbit's garden and fell asleep.