Disclaimer: I own nothing except for my original character. Everything else is property of New Line Cinema, Peter Jackson, etc. The idea for wargs responding to calls of other wargs was inspired by Harry Potter and the Prisoner of Azkaban, when Hermione describes werewolves answering the calls of their own kind.
Not for the first time, Gwyn cursed her lack of weaponry. Hell, she thought, even the hobbit has a knife now, and I'm left defenseless! Gwyn had seen Gandalf give a short blade to Bilbo from the corner of her eye shortly after the Wizard emerged from the trolls' cave. She began scanning the ground for anything that she could use to defend herself, when a strange man riding a sled pulled by large rabbits burst into the clearing. Gandalf immediately relaxed and declared the newcomer was his friend, Radagast the Brown, a fellow Wizard. Gwyn mentally smacked herself on the forehead for not remembering that bit of the story.
While Gandalf and Radagast discussed the sickness of the Greenwood, Gwyn kept one ear on the Wizards and one ear on the sounds of the forest. She could hear movement approaching the Company from above the cave. Once again, just as she was about to call attention to it, the noise stopped, and a long, loud howl sounded nearby. Bilbo was obviously nervous about the sound and its proximity, and this nervousness was increased one hundred-fold when Bofur mentioned that the howl was not made by a wolf, but by a warg. After the warg-scout appeared over the crest of the cave and was promptly dispatched by Thorin and Dwalin, Thorin and Gandalf began to argue over how the warg and subsequent orc pack could have known about the quest. Gwyn rolled her eyes and, with a shrill whistle, drew attention to the fact that the Company needed to hoof it away from the carcass, before the rest of the wargs found them. Radagast volunteered to lead the wargs and their orcish riders away so that the Company could escape.
While Radagast and his Rhosgobel rabbits began leading the wargs and riders away, the dwarves, girl, hobbit, and Wizard began running, taking cover behind large rock formations. It looked to Gwyn that the orcs had caught on surprisingly quickly to Radagast's plan, and were splintering off to look for the dwarves. Quickly scanning the situation, Gwyn had a brilliantly stupid idea, thinking of something she'd heard about werewolves answering the call of their own. She wondered if the wargs were that stupid. Only one way to find out, she mentally shrugged, before motioning to get Thorin's attention. He looked dubious about her plan after she whispered it to him, but allowed her to proceed. After mapping the area, Gwyn cupped her hands near her mouth, and released a howl that was a remarkable imitation of the wargs' calls. The brilliant trick to her plan was the fact that Gwyn could throw her voice, and so her howl sounded off to the right of the pack. When the creatures began following the sound of her call she did a mental victory dance. The Company quickly scurried to the next rocky outcropping, and Gwyn repeated her trick, this time sending the pack off in the opposite direction than they had been heading in.
After Gwyn's trick had worked a second time, the Company looked at her in astonishment, to which she shrugged. Her triumph was short-lived however, because soon after that, she could hear a warg and rider scenting for the Company from the top of the very rock they were hiding behind. As Thorin motioned to Kili to shoot the beast, Gwyn snuck over to Fili and borrowed one of his many long knives and snuck around behind where she calculated the beast and rider would fall. She caught Kili's eye and suggested, using modified sign language, that he aim for the warg's throat. Thorin gave the signal, and the warg fell, an arrow embedded perfectly in its voice box, silencing it. Just as the orc was about to scream, alerting the rest of the pack to the Company's whereabouts, Gwyn used Fili's borrowed knife to slit the orc's throat from behind. Again, her actions were met with looks of amazement. Gwyn rolled her eyes before informing Fili that she was going to hang on to his knife for the time being. He did not have time to respond, as they were soon set upon by more of the pack. Fili's long knife (which seemed to be more of a short sword to Gwyn) was somewhat unwieldy in her hands, but Gwyn was able to effectively defend herself.
Suddenly, Gandalf's head popped up from behind a rock, calling the Company over. With Kili covering the retreat, Gwyn heard the sounds of horns being sounded and horse hooves as she vaulted over the rock Gandalf appeared behind, and she slid down a hidden chute, landing gracefully on her feet at the bottom. One by one, the rest of the Company slid down, most of them landing in a heap at the bottom. Gwyn passed the borrowed knife back to Fili with her thanks when he finally extricated himself from the pile of dwarves.
"It was my pleasure, Miss Gwyn," he responded with a smile, "although, if I may ask, how did you think to slit that orc's throat?" She smiled and shrugged as Kili joined his brother and Gwyn.
Thorin marched over and was quite angry at Gwyn, and at Gandalf. "What in Mahal's name was that?! Never have I seen such utter stupidity on a field of battle!" Gwyn bristled, and the rest of the Company began watching with a certain amount of wariness.
"Well, I'm sorry I just saved EVERYBODY'S lives with my foolishness! If I hadn't slit the orc's throat, we would have had even more trouble, because he would have alerted the others to our location!" Gwyn snapped. Many members of the Company nodded in agreement with her reasoning.
Just then, Dwalin called from the back of the cave they were hidden in, asking if they should follow the path he had found. Before anyone had time to answer, Gwyn stormed off, angrily brushing past Dwalin. She could hear Fili and Kili both following closely behind her, and the rest of the Company behind them, and Gandalf, Bilbo, and Thorin bringing up the rear. Fili and Kili caught up to her, and they were trying to placate Gwyn, and calm her from what was revealing itself to be a truly formidable temper.
Gwyn was the first of the Company to spot the end of the tunnel they were in, so she was the first to see the Valley of Imladris. She took a deep breath of clean, fresh air, and turned to Fili and Kili, scowl replaced with a bright smile. She began laughing at the brothers' responses to her sudden shift in mood. While Gwyn was pleased at the turn of events, Thorin's already dark look grew even darker at his realization of the fact that Gandalf had led the dwarves straight to the elves.