Threaders were a subspecies of the Arathim. They were much smaller than their Silk Spitter brethren, being diminutive enough to conceal themselves within the folds of clothing and the cracks of buildings. Threaders possessed the ability to take control of other creatures in order incorporate them into the Ascendancy. Being attached to one for too long, according to Tavra's threader, made the attachment permanent, though only until the host's death.
What? You dare try to control Aughra? Aughra can barely control Aughra!Aughra to a Threader that tried to possess her
During the early days of the Gelfling resistance, the Threaders were apparently a relatively new addition to the Ascendancy, as both skekVar and Rian, both veterans of past encounters with the Arathim, expressed surprise at learning of their existence.
Behind the scenesEdit
Threaders were first introduced in J.M. Lee's Song of the Dark Crystal, in which they were originally called Crystal Singers. However, Jeffrey Addiss and Will Matthews chose to call the creatures “Threaders” in Age of Resistance because they felt that there were too many objects in the franchise with the name "crystal". When asked why the Arathim didn't use the Threaders on the Skeksis, Matthews replied:
In the books, the crystal singers have this ability to hear—they can sort of overhear dreamfasting, because of their connection to the crystal. Because even the spinners, the Arathim, they are creatures of Thra as well. So they all have a connection to the crystal, and that binds all of them together. You remember, the Skeksis are not from Thra. The reason they don’t work on the Skeksis is, one: By the time [the Threaders] emerge, the Arathim were already defeated militarily and morally by the Skeksis. They don’t think to turn on them. And two: Because the Skeksis don’t dreamfast, they don’t have a connection to the crystal. We thought their mind control abilities would work on [the Gelfling] because the positive way to look at mind control is more of a mind-melding. You can’t do that with the Skeksis when they’re not connected to the crystal.Will Matthews, 
- ↑ 1.0 1.1 Age of Resistance – "Time to Make...My Move". Netflix. August 30, 2019
- ↑ Lee, J. M. (2019), Heroes of the Resistance, Penguin Young Readers Licences, ISBN 978-0.593-09539-3
- ↑ Age of Resistance – "Prophets Don't Know Everything". Netflix. August 30, 2019
- ↑ 4.0 4.1 B. Elderkin, "A Spoiler-Filled Chat With Dark Crystal: Age of Resistance's Creators", Io9.gizmodo.com, September 3, 2019