Or pencil-pusher, secretary, majordomo, butler, etc. The name isn’t as important as the function–being able to account for all your clan’s assets in one place. It’s a quality-of-life thrall, but it could help larger clans manage what they have/need.
While it is certainly plausible that the entirety of the Exiled Lands is populated with craftsmen, priests, sorcerers, and pirates, certainly there are a few business types wandering around? Men and women of a higher education; middle-class merchants and servants that spent their days managing businesses and households before coming to the Exiled Lands?
The primary function of these thralls would be to show an accounting of all items and resources in all clan-owned boxes, vaults, and chests across the map. Much like an armorer or blacksmith, they would be placed in a station (most likely sitting at a desk covered in ledgers).
Depending on their tier, you could then craft reports on the current status of your supply. These reports would look very much like simple notes, and the description would be the actual report, timestamped for personal bookkeeping.
Tier 1 Scribes could simply punch out the numbers on basic building materials, such as stone, wood, resin. Tier 2 could start tracking reinforcements, bricks, weapons and alchemical components, and Tier 3 could take an accounting of boxed thralls and exotic weaponry, siege items, boss loot. Tier 4? Every item in your clan’s possession.
Just a simple suggestion if anyone is looking to add a new thrall type. And if any modders are reading, feel free to try your hand at making it work.
Also, anyone is welcome to poke holes in the idea, find flaws or point out improvements to the idea.