The following mainly comes from initial traditional tribes in general, not including tribes who have mixed origins and other case-by-case variable exceptions.
As one of the nine foundational tribes, the [Six-arms Demon Tribe] were initially as several of separated tribes whose tribal homelands were located around northern snowy mountainous region of Anima continent while having common custom on worshipping certain six-armed deity whose exact context is more or less similar between each one nonetheless. After receiving their own Grimm-form and then returning to their own tribal homelands in Anima, they started to started to build and spread out their own influence range across the whole Anima continent (including Spiky-vine Archipelago) via either military mean (including launching several raids on other non-[Six-arms Demon]-settlements (whether from Grimm-folks or nor) within Anima continent (mainly, If not almost, focus on those on land surface)) or having political marriage with other (mainly human) settlements for as the exchange for either the discontinuation of raiding said settlements and leaving these settlements alone. And then, for many those [Six-arms Demon] tribes who married with original (mainly human) residents from the other local settlements in the [Six-arms Demon] tribes’ expanded zone, the said [Six-arms Demon] tribes’ original cultures began to introduced/merged (or even highly assimilated) with the cultures of original (mainly human) residents from the other local settlements and then later became their own independent cultural-social entities, who are highly different compare to their original one, within their own lived territories of their own different environment in many different region within Anima continent (along with increasing rivalry relationships between each [Six-arms Demon] tribes as well), besides some of these [Six-arms Demon] tribes start to build and maintain decent trading relationships with other eastern (Anima) Grimm-folk tribes, such as [Perfume succubus] tribes, [Darkvine plantman] tribes, and [Blackmud demon] tribes, for keeping positive the exterior relationship with other eastern (Anima) Grimm-folk tribes at certain level along with exchanging various goods. And then, when around the beginning of first mistral empire era, despite there were few of (mainly from southern-west region ones) [Six-arms Demon] tribes having several crashes with newly-birthed first mistral empire (especially on military ones) including the ones fought within the Anima inland sea when first mistral imperial naval force fight against certain invading multi-tribal coalition naval force which mainly consisted of some southern-west [Six-arms Demon] tribes as the leading force along with few of other eastern (Anima) Grimm-folk tribes (including [Darkvine plantman] tribes and [Tree swinging fabric-strip demon] tribes) as supporting/assisting force, most of (including the northern ones) [Six-arms Demon] tribes had generally good relationship with first mistral empire and usually came to first mistral empire for either trading or studying and learning from the first mistral empire such as cultural learning and several advanced material-crafting/blacksmithing techniques, as well as there were even few of certain individuals work as independent hired/voluntary mercenary that fought along with first mistral imperial military, and then after their several interactive contacts with members of Mistral's Four underworld families (especially Northern clan as their first interactive object), many of (especially those from the northern region) [Six-arms Demon] tribal members have shown their own interest on Mistral's Four underworld families and participated under the ruling structure of Mistral's Four underworld families. And then during the period between first mistral empire era and second mistral empire era, many of [Six-arms Demon] tribal members were already lived under the ruling structure of Mistral's Four underworld families, particularly in {Northern clan}, and there were even increasing numbers of [Six-arms Demon] tribal members moved across further to Mistral’s capital area's east side and then joined and lived under the ruling structure of {Eastern clan} of Mistral's Four underworld families. Finally, after the implementation of "nighttime-wandering order", asides from there are most of their own tribes (including those from Spiky-vine Archipelago) still living within their own (original or expanded zone) tribal homelands in Anima, there are no any significant impacts on their tribal daily lives despite having previous damages caused from those interior conflicts between Mistral's Four underworld families after the Great war as well as the relatively chaotic situation of their "clan leader" 's families in Northern clan of Mistral's Four underworld families when was occurred at around the end of the Great War, and still continue on both their commercial activities and daily lives within the Kingdom of Mistral's capital as usual. Besides, there are certain amount of [Six-arms Demon] tribal members come to Mistral’s capital for either commercial activities, learning (such as martial arts and usage of Aura), visiting their own tribal member who live within the Mistral's capital or sometime have their own tour on certain large-scale underground urban district of {Eastern clan}'s Grimm-folk tribal members below the {Eastern clan}'s said turf, and even some, especially younger individuals, come to Mistral's capital and have some life experiences of living among Mistral's civilian daily lifestyles.
[Grimm-form appearance]
In said stage form of Grimm-form transformation, aside from "turning their sclerae's color from white into black" along with their iris will glow at a certain level, a black-outlined purple-central vertical-symmetrical white flame-shaped mark is appearing on central of the said user’s forehead, also the skin color of said user’s entire body are changed into purple as well.
In said stage form of Grimm-form transformation, aside from these above-mentioned appearance characteristics, additional two pairs of Grimm-like matter-made pseudo-biological-texture (one (human-like one-thumb-and-four-fingers-included) hand per arm) arms are generated from the said user's back, that one of pairs of additional arms are positioned on behind the said user's shoulders while the another pairs of additional arms are positioned on behind between lower chest and upper waist, making the said user's appearance in said stage form having the physical trait of six arms in total.
Note: these muscle shapes of generated Grimm-like matter-made pseudo-biological-texture arms are dependent on the said user's current original arm-muscle shapes (e.g. said user's arm-muscles becoming more muscular after certain intense gym workouts). Besides, generally speaking, assuming both genders receiving same level of physical training, the said male users' muscle shapes of generated Grimm-like matter-made pseudo-biological-texture arms are apparently more muscular compare to their female counterparts.
[Grimm-form ability]
In said Grimm-form, aside from negating Grimm's sense and mask said users’ "human/soul presence", making the said user seem "invisible" and "undetectable" to the Grimm which able to reduce the Grimm's attraction and even further decrease the Grimm's aggression and hostility tension toward the said user and having enhanced said user’s basic physical properties (including strength and durability) that allow them to have similar equal footing with huntsmen and huntress, under having generated-from-user's-body additional two pairs of Grimm-like matter-made pseudo-biological-texture arms (a pairs of arms are positioned on behind the shoulders while other pairs are positioned on behind between lower chest and upper waist), the said user also able to manipulate six arms (along with three pairs of hands), granting the said user independent, simultaneous control over all six of the said user's arms (along with hands). Also, the said user able to modify the physical texture properties of generated Grimm-like matter-made pseudo-biological-texture arms at will in order to increase said generated Grimm-like matter-made pseudo-biological-texture arms' toughness to the point that able to have more physical resistance against both bladed and blunt weapons and even bounce off concentrated volley of rifle-fired bullets.
Note: In terms of (both original and later additional Grimm-like matter-made generated) limbs movement prioritization at will, the said user's original limbs have higher movement priority compared to additional Grimm-like matter-made generated ones, so in other words, the said user able to use six arms at will when in Grimm-form while without being interfered and complicated by later additional two pairs of Grimm-like matter-made generated arms.
Besides, said user also has access to regenerative healing capability that able to heal up either at least large amount (at least twenty) of piercing wounds which go through the chest caused by large throwing spear, certain amounts of piercing wounds which go through the chest caused by some concentrated musket-ball volley firing or at least four to five piercing wounds which go through the chest caused by towering-tree-trunk-wide ballista-launching spear, though these wounds which are higher than above mentioned wounds need additional amount of medical care for the purpose of accelerating the healing process. Besides, regenerative healing performance in completed form of Grimm-form transformation is obviously better than in partial form of Grimm-form transformation, though not better than [Oni demon].
Combat Application:
When fighting as individual, under the unarmed circumstances, the said user can uses either said user's original limbs, later additional Grimm-like matter-made generated limbs or both of these above-mentioned limbs to strike multiple opponents or hit a single target with a barrage of punches at the same time, also the said user can coordinates all six fists to strike from multiple angles to overwhelm foes in close combat, also the said user can uses all six of both said user's original upper limbs and later additional Grimm-like matter-made generated upper limbs to deliver multiple ground pound strikes on said opponent after said opponent being pinned down on ground/floor, besides the said user can uses the said user's original upper limbs to block opponent's attack in order to attract said opponent's focus and attention and then either use one (or three, or four) of later additional Grimm-like matter-made generated upper limbs to deliver sucker punch-like strike(s) on said opponent's blind spots (e.g. temples and lower abdomen) during the said fighting, or use all four of later additional Grimm-like matter-made generated upper limbs to further block and defend the said user against said opponent's strikes at first and then use sweeping-floor kick/low sidekick to strike said opponent's legs to trip over said opponent fall on ground. Furthermore, the said user can uses one of the either said user's original limbs, later additional Grimm-like matter-made generated limbs or even all six of both said user's original limbs and later additional Grimm-like matter-made generated limbs to grab the opponent and then throws the said opponent far away, or can uses multiple (or even all six of) limbs which grabs about one opponent per each limb and then throws the said multiple opponents far away, besides the said user can two pairs of (including a pair of original upper limbs and upper-positioned pair of upper additional Grimm-like matter-made generated limbs) upper limbs to hold, pin down and control said opponent's upper limbs while the user's remaining pair of limbs (aka the lower-positioned pair of additional Grimm-like matter-made generated upper limbs) to hold, pin down and control said opponent's lower limbs, also the said user can uses all six of both said user's original upper limbs and later additional Grimm-like matter-made generated limbs to wrap and hug over the said opponent's body for encasing as well as having overall control on the said opponent's body or (in more lethal way) trapping over the said opponent's body to suffocate or crush said opponent. Besides, the said user can uses one or two later additional Grimm-like matter-made generated limbs while modifying the physical texture properties of generated Grimm-like matter-made pseudo-biological-texture arms at will in order to increase said generated Grimm-like matter-made pseudo-biological-texture arms' toughness at will in order to cover head, abdomen or both to block opponent's attacks (including bladed and blunt weapons and even bounce off concentrated volley of rifle-fired bullet) while providing the addition protective cover for the said user, and even can uses two of the Grimm-like matter-made generated limbs to cover the head and abdomen respectively for the following rush towards and crash the said opponent, and additionally, the said user also use the elbow(s) of both said user's original upper limbs and later additional Grimm-like matter-made generated upper limbs to deliver multiple roundhouse elbow front/back strikes on said opponent. special technique: said user can use at least one (or two) of later additional Grimm-like matter-made generated upper limbs as supportive leverage lever for standing back up the said user's body or slow down said user's falling/be-thrown-away speed via using at least one (or two) of later additional Grimm-like matter-made generated upper limbs to grab on ground/floor as grappled point to put the said user's body up as well as stand again on ground solidly, furthermore said user uses at least one later additional Grimm-like matter-made generated upper limbs as hanging lever/holding lever on anything that could be used as hanging/holding for hanging the said user in midair while allow the said user's own remaining limbs to do other works (e.g. fighting).
And then, under the armed circumstances (following will use said user's completed Grimm-form as the demonstrated example), the said user can either uses the small shield which is brought and hold by said user's original (non-dominant-side) upper limbs for providing furthermore protection on the said user, or uses the large shield which is brought and hold by said user's (non-dominant-side) upper limbs of both said user's original pair of upper limbs as well as additional two (both upper-positioned and lower-positioned) pairs of Grimm-like matter-made generated upper limbs. And in terms of weapon holding, upper-positioned additional Grimm-like matter-made generated upper limbs in completed Grimm-form of said user are usually holding throwing/long-range weapons (e.g. throwing spears, throwing knifes, slings, throwing clubs and pistols from later period along with other throwable weapons/tools like primitive-style hand grenades and rope-attached grapple hook), and then original upper limbs in completed Grimm-form of said user are usually holding main melee weapons (e.g. polearms, sword, mace) along with occasional few long-range weapons (e.g. bow and arrows, carbine-type firearm) when using the bow, the said user use one of original (non-dominant-side) upper limb to hold bow's riser along with two (upper-positioned and lower-positioned) additional Grimm-like matter-made generated (non-dominant-side) upper limbs used as minor protection for the said user via either holding the bucker-sized shield or modifying the physical texture properties of generated Grimm-like matter-made pseudo-biological-texture arms at will to increase said generated Grimm-like matter-made pseudo-biological-texture arms' toughness, while using one of original (dominant-side) upper limb along with two (upper-positioned and lower-positioned) additional Grimm-like matter-made generated (dominant-side) upper limbs to hold bow's bowstring, and lastly lower-positioned additional Grimm-like matter-made generated upper limbs in completed Grimm-form of said user are usually holding backup short melee weapon (e.g. dagger), along with occasional few hidden throwing weapons (e.g. throwing knife).
When fighting as group, the said users (under in their own completed Grimm-form) tend to let their own large-shield-equipped counterparts be placed at frontline/vanguard position among their own group for covering and protecting their own group from their opponent's attack while long-range-weapons-equipped counterparts (e.g. ones who equipped with bow and arrows, ones who equipped with sling, ones who equipped with throwing weapons like throwing spears, throwing clubs and primitive-style hand grenades, ones who equipped with firearms like pistols and carbine-type firearm) be placed at behind-the-line position among their own group for providing their long-range attack for their own group as well as suppressing toward their opponent, and then after several long range attack volley provided by their own long-range-weapons-equipped counterparts among their own group, their own melee-weapon-equipped counterparts who are placed at center/further behind position among their own group will either charge forward toward their opponent group as line-breaker/shock-trooper or attack their opponent group on flanking sides as mobile force while the group formation for both large-shield-equipped counterparts and long-range-weapons-equipped counterparts make their own formation in more loose manner and widen the gap within to let their own melee-weapon-equipped counterparts go through among the said their own group formation.
In terms of (at least in ancient-time) shipboard warfare, the said user tend to let their own large-shield-equipped counterparts be placed at front of their own vessel for providing covering and protection to their own crew from their opponent's attack while their own rowers counterparts are under either in their own partial Grimm-form or in original human form for providing their own vessel propulsional power via rowing their oars as well as maneuverability via their steering paddles. Then, when ready to boarding their opponent's vessel, their own long-range-weapons-equipped counterparts (e.g. ones who equipped with bow and arrows, ones who equipped with sling, ones who equipped with throwing weapons like throwing spears, throwing clubs and primitive-style hand grenades, ones who equipped with firearms like pistols and carbine-type firearm) on their own vessel will providing their long-range attack for their own group as well as suppressing toward their opponent while their own rope-attached grapple hook-equipped counterparts will use and throw rope-attached grapple hook to grapple their opponent's vessel as well as pulling the said grappled their opponent's vessel toward themselves for the following boarding actions once getting their opponent's vessel even more closer. After that, once both vessels of their own and their opponent's are lock together, the said user tend to let their own melee-weapon-(sometimes-with-some small-sized-shield)-equipped counterparts on their own vessel will launch boarding action as well as taking over the their opponent's vessel.
Because there are high numbers of [Six-arms demon] Grimm-folk tribes that are impossible to list them all, these following introduced [Six-arms demon] Grimm-folk tribes will be cataloged according to the approximate regional cultural sphere where these said tribes' lived in.
custom made upper clothes with two pairs of hidden gaps which are located on behind the shoulders and behind between lower chest and upper waist of the back respectively
Despite having the common custom on worshipping the six-armed deity, the detailed religion content on their six-armed deity have their own interpretation among each different tribes
six-arts
1. Northern Anima tribes
[Societal Aspects]
[Cultural Aspects]
North india/Evenki/Tibetans
2. Southern-west Anima tribes
[Societal Aspects]
[Cultural Aspects]
Dai people/Bouyei people/Bulang people
In terms of clothing, front-opening short-sleeved shirt
3. Northern-east peninsula Anima tribes
[Societal Aspects]
[Cultural Aspects]
Viking-ish/Nanai people/Oroqen people
4. Southern-east Anima tribes
[Societal Aspects]
[Cultural Aspects]
ancient greek-ish
5. Spiky-vine Archipelago tribes
[Societal Aspects]
[Cultural Aspects]
Tahitian/Samoans/Māori