Grimnyr
A prominent figure in the Leagues of Votann, the Grimnyr are a rare breed of Kin created from Cloneskeins that allow them to channel the powers of the Warp.
Early in their history the Kin figured out how to dim their souls to make sure that certain rambunctious, chummy, nerdy, and artistic sorts would have a tough time getting their mitts onto all that Dark Age of Technology goodness they had kicking around. This had the knock-on effect of shooting their psychic potential in the foot in a manner very similar to the space commies, which was a problem since the Votann themselves have a lot of their data stored behind "empyric" locks that require warp-fuckery to access. So, in a great bout of common sense, the Votann devised a Cloneskein for psykers so that the Leagues would always have some psychic might kicking around, but in a more controlled and focused manner compared to rounding up anyone with a slightly weird mannerism to cart them off to a lifetime of misery followed by an agonizing death to become fuel for a psychic lighthouse.
The Grimnyr are something of a priestly caste for the Kin, which is weird because of how secular and rational the Kin tend to be otherwise. Grimnyr commune with the Votann to determine what course their people should take or to access data-stores that only the psychically attuned can. In much the same way as the Living Ancestors of the Squats, Grimnyr are depicted as being a bunch of old fucks with huge beards that will snap your neck from across the street if you even think about stepping on their lawn. Each League also has a single "Lord Grimnyr" who acts as the Mouth of Sauron for their Votann, acting as its eyes, ears, and voice within the League and on the battlefield.