So my Species Nox Noctis does have different breeds and with new found motivation I might actually start their comic and digitizing what I've so far drawn. this was a sketch I started back in 2018 (and finally) have the motivation to actually flesh out. So I believe this is the first doodle of this species I have uploaded I will take the information about it I wrote down and place it here.
Also as information given. The loss of this limb was not because of a fight or injury on the job. That was indeed because of their neurological impairment forcing them to believe this limb was a parasite that did not belong on their body, getting so bad that they forcibly ripped it from their own body and had to have stitches on their side. The disease will be spoken about in slightly more detail further down.
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Information:
Speccies: Nox Noctis
Breed: Iso breed (Isolated)

Identifying attributes:
Well known for having a more angular face than any other of the Nox Noctis is a fast way to try to tell them apart from the more aggressive breeds of the Nox Noctis
They have 6 stiches on their mouths,
They have no tuft of fur in front of the ears.
Aprox. 6 foot tall.
Females as the one stated in this art piece have a 'butterfly-like fan' spike on the tips of the female's ears.
Males tend to have three slightly curled prongs of stiff fur that are on the inside top of the tip of the ears.
This breed has rather long legs compared to its torso and upper body.
Even though their legs can bend in off, or odd ways; please remember that all breeds of this species, Nox Noctis; can do this as they all do not have bones nor muscles.
This intelligent species tend to smoke cigars and cigarettes as the tar helps strengthen the threads of their internal threads to become stronger.
Apart from Apotemnophilia, they are rather well-mannered, level-headed, and laid back.
They like a lot of different hair styles-as well as some such as Bridgante`- will straighten their hair as well.
An oddity on their body is the semi digi-grade legs and paw-like feet/toes.
Their hand has 3 fingers and one thumb.
Their fur does not stand up as most all breeds of the Nox Noctis species do.
They are the only ones that exhibit the weird trait of a curled tail

Personality: This breed for some unknown reason tends to develop the mental issue(disease) however you want to acknowledge it: "Apotemnophilia" or "B.I.I.D." Information of this is as follows. Its a neurological disorder character fed by the intense and long-standing desire for amputation of a specific limb, or need to become paralyzed, blind, or deaf.
They have first described (made history) in 1977 as paraphilia; but others say its a neurological disorder caused by an incomplete body image map in the right parietal lobe.
Some, because of the disorder will cut their sides, limbs, even arms; leaving a new 'stitching' spot as well on their body besides the normal, identifying frontal hole and stitch that all Nox Noctis bare.
Amongst this they are easily addicted to games especially if they involve puzzles.
On a better note; they love clothing, which adds to the appearance that other's think they are pot heads. Or they tend to like a lot of leathers and buckles especially if they are the more assassinator style type of this breed.

Body colors and references to possible color breed splicing:
From isolation, they tend to have either foggy, watery, blueish, grey/gray, or soft moss-green colors.
Rarities will see frosted tips if they are in a snowy or desert-like area that has slight hue changes that resemble the patterns of twigs poking out of snow, shrubbery molt patterns, or clumps of weeds or cactus-like patterns on the fur to blend in better.

Characteristics and Social standing:
This species is more of an ambush breed.
Their stitches are on their front and back; as they tend to be crouched or laying on their stomachs while waiting for prey.
Often mistake for pot heads and junkies but just like the cigs and any junk food (despite their body not easily accepting that type of nutrition).

Out of all the breeds; this species most easily learns electronics. Technology is easy for them to learn and because of this, they can quickly find, give out, and learn to spread crucial information that can then be used to either hunt or help themselves.*

*As well as to more easily communicate with the breeds in the 'real world' (Where humans live)
The ones in the marsh, swampy, or ocean-like isolated areas. (Not to be confused with the open ocean.)
They will not leave solid ground.
If forced off land they will not go outside of 2 miles of solid ground at any time of day and year. They tend to as well, have larger wings but the muscles are not built for flight. Instead they are more so used for swimming, pushing the loose moss and weeds out of the way, twigs, and brush. As well as to help the water as they stalk in the swampy waters.

Despite having a more laid-back mentality, they tend to make better assassins or heavy laborers than any other breed of this species.