As soon as the fighting ended arya turned invisible and sneaked up to the Fey creature and grabbed it. Turning visible again when doing that. She would say in sylvan: "What are you doing. How did you get here?"
Now close you could see the quicklingss features, akin to your people but exaggerated, pointed and thin. It's eyes sparkles with a cold gleam, akin to small jewels. As your hands wrap around the quickling the invisibility that cloaked your steps drops. The creature shrieked in suprise, a noise that sounded like a pig in distress but if the pitch had been turned as high as it could go. With blinding speed it shifted in your grip and grabbed a dagger that lay by it's side, shifting it's grip on it, intending to bring it up to your throat. However as it shifted it caught sight of your now visible face it froze for a moment. Still grasped by your hands, it dropped the dagger and fell as limp as it could. Speaking in an extremely fast pace it shot out.
"Mistress I am so sorry I didn't know it was you I would never attack one such as you my apologies Eiller is watching as instructed I did not do anything wrong mistress." Hardly taking a breath after that barrage of words it continued, now answering your question."I am watching, watching the chosens. I got here quick over the water but first through the henge quick as you like!"
Arya (Sandra)
Arya did not seem to react to what the quickling said only someone paying high attention would notice the confusion in her mind. "The henge? Is that how you traveled here? Is there a portal out in the mere?" She would look out over the water to see if she could see anything and in her voice she could not completely hide her excitement although she did her best to. Realizing she might have revealed herself her expression would harden. Then looking back at the quickling and fixing her eyes on it with a stern gaze. "Who sent you to watch?"
DM (Charalampos "Babis")
"Yeah yeah the henge in..." The quicklings eyes suddenly narrow and then go incredibly wide, it's exaggerated features making the expression appear quite comical.
"Wait wait wait, you're not one of the blessed daughters! You look like them, smell like them but don't know about the henge? A spy!" The Quickljng starts shrieking and thrashing, the noise making one of the guards who was being debriefied look over, a look of annoyance crossing their face.
Arya (Sandra)
Arya would immediately realize her mistake and try to grip more firmly around the creature but feeling it wriggeling our of her grip (Ath=4). This creature could have so many answears and as she feels the desperation inside her she reach after powers inside her that she does not often use. With a firm voice she would say: "You are mistaken. I am one of the blessed daughters and you will OBEY me." And she will cast Geas on the quickling.
DM (Charalampos "Babis")
The Quickling puts its legs unto Aryas arm and pushes out, a graceful cartwheel in the air making it land out of her grap [Nat 20 acrobatics!]. It turns around, seemingly about to run. As you speak out your command you realise that this creature is too fast and that it would be out of range before you competed your spell.
Arya (Sandra) Realizing she wont be having the time she will make the growth in the mere reach out of the water and try to grab the creature.
DM (Charalampos "Babis")
You reach out and instead of commanding the quickling you command nature instead. Watter sogged roots shout out of the water and wrap around the Quickling, that was too focused on getting away to avoid the entangled area.Rushing forward, careful to avoid those grasping roots, ready yourself to tie the Quickling down. It gets another opportunity to free itself but fails, it's strength being as a small as its stature. You tie it up with ease.
[I will say, due to jumping into this situation Arya does feel inspired. Gain an insp. point.]