Appearance and Biology: Ngghrya are thin, almost skeletal in appearance with rough, nodule-covered skin that almost resembles carapace. Their thinness belies their strength and durability. Their skin is scaled in places with dermal denticles, but also has ridges and horns of calcium carbonate deposition that begin to form at puberty and elaborate as they age.
Ngghrya exhibit slightly less sexual dimorphism in terms of size than baseline humans, but some male ngghrya grow "tusks" of keratin from both ends of their upper lip.
Psychology and Psi: Ngghrya are a somewhat superstitious people, but do not revere gods or supernatural beings as such. Rather, they seek to avoid notice of spirit entities by the proper ritual behaviors and taboos (some of them idiosyncratic) except at certain times.
They tend to be a taciturn people by the baseline standards but fairly accepting of other cultures so long as they are respected. The stresses of their current existence on their homeworld have led to increased substance use, violence, and a mistrust of non-ngghrya.
Some ngghrya (a disproportionate number found off-world) are trackers, bounty hunters, or skiptracers, thanks to a psi-like ability. They are able to track any quarry across any distance, even light-years of space. This ability (called yaa'hii by the ngghrya) is thought to be instilled by a ritual involving an hallucinogenic substance native to the caves of the mountains of their homeworld.
Psi-researchers believe this ability creates in their brains circuits the equivalent of time loop logic computer, using telepathic data sent back through time by their future self and the Novikov self-consistency principle for error correction. This theory is lent support by the assertion by ngghrya trackers that they cannot catch any quarry they haven't already caught.
Stats: Stars Without Number: Ngghrya have +1 to Constitution. Tracking: On a failed Mental Effects saving throw, the target will be found by the ngghrya. Note that being found doesn't necessarily mean capture or defeat. Escape may mean another saving throw, if the ngghrya is alive and still on the job.