'日'
'日'

Sun Breathing shares its status and origin with Moon Breathing as the first breath to exist, it has 13 forms and goes by Hinokami Kagura.
D e r i v a t i v e s: Flame Breathing, Water Breathing & Stone Breathing

'月'
'月'

Moon Breathing shares the status and origin with Sun Breathing as the first breath to exist, it has a recorded total of 8 forms, technically it's 16 as the other half were made when Michikatsu became Kokushibō.
D e r i v a t i v e s: Thunder Breathing, Wind Breathing

'Breathing Styles'
'Breathing Styles'

Breathing Styles more or less, are similar to Canon; visual graphics that mimic the elements based on ones swordplay, fueled by Total Concentration Breathing, and in our AU, by the time Demon Slayers reach the Hinoe rank, the elements become real and similarly functions to that of Blood Demon Arts. This is to end the divided Fandom & Player debate regarding preferences of which is preferable and I believe that such exception, justifies the power of the Hashira and those of Hinoe rank and beyond. With proper caution and commonsense, said real elements will have close moderation despite anime physics.

'Breathing Forms'
'Breathing Forms'

No Player will add new forms to Sun & Moon Breathing, since both canonically got the most numbers, Players are still welcome to add new forms to any pre-existing styles, let alone make an entirely new Breath, minimum 3 to the premade while we will allow 5 forms for an entirely new style. Forms made by the canon like how Giyu and Zenitsu had done so, are available and used for practicality.

'Demon Slayer Mark'
'Demon Slayer Mark'

No Player is going to have the Demon Slayer Mark from the start & that means null as I will not be accepting even those who are born with it. The Demon Slayer Mark will claim your life at 25^yo and the only exception is; if you're born with it, allowing you to live up to 80^yo or becoming a Demon, which I keep a close watch as I will be the one to choose who gets it first. I have the right to decide on which Players are born with the mark alongside Sun Breathing. Red Nichirin Blades are a no-no from the start.

For one to awaken the mark, Sun & Moon must awaken together, the rest will resonate.

Muzan held consistent stronghold over his Demons, so much so, a simple mention of his name, ends the existence of weaker Demons, to get stronger, they're reliant towards receiving more blood from the Demon King, as we know, the 12 Moons were the peak of his army.

Demons that come from Tamayo and Yushiro, aren't bound by Muzan's jurisdiction and they aren't keen on eating flesh, they drink minimal blood to survive yet is still weak to the Sun, and should Yushiro die, these Demons still live.

'八血月'
'八血月'

The Yatsuchizuki aka 8 Blood Moons are the strongest Demons of Michikatsu, and they take after their Master, none of them will die from decapitation & to defeat a Chizuki, it's either a stall until sunrise, Wisteria poisoning or Red Nichirin Blades.

For 60-years, the Yatsuchizuki has minimal changes, there's rarely ever an attrition to the ranks and Michikatsu. The Yatsuchizuki are defined as Yakuza Lords, and are scattered, stationed in each region of Japan. To Humans, they appear to be more than just Humans in disguise but Japan's biggest crime syndicate. Whereas, their King is the Mayor of Funachi City.

The Four Demon Lords
The Four Demon Lords are Michikatsu's immediate successors, they are given the task to control each region of Japan. They're Michikatsu's own Upper Moons, and beyond conquest, their penultimate mission is to kill the Demon King in a Yubikiri, meaning promise renouncal via succession. None of them succeeded in becoming the next Demon King.

The Four Demon Consorts
The Four Demon Consorts are Michikatsu's all girl band & his version of the Lower Moons. Otherwise known as the Rasetsu, these Demons are special since they are capable of producing offspring. Any child borne from their progeny will be fullborn Demons and not hybrids. Unlike the Demon Lords, Michikatsu's designed them as wives for his Demon Lords.

Blood Rite Battles
A Demon Lord cannot be a Consort and neither can a Consort be a Demon Lord, for these are gender confirming roles.

Ranks, however, inside their group, commences the Blood Rite Battle.

A Mangetsuki is a High Level Demon, often serving as Regents of each Chizuki & unlike their Demon Lords and Demon Consorts, who wear formal clothing, these are the modern day Yakuza thug that one would imagine, they got the tattoos of human blood, a perfect reference to Yakuza culture, as they're also missing a pinky finger, it's moreo so they can't regenerate it.

These are the World War 2 Demons, suffering radioactive mutation, they're beyond reason.

'O C N a m e'
'O C N a m e'

^{P e r s o n a l i t y} :
What you are?

^{S h o w a S e c r e t} :
Brief backstory.

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'K o k y ū'
'K o k y ū'

^{F l a m b o y a n c e} : Explain the teachings & mechanics of the breathing style you use. If it is a branch or derivative breathing style, list what style it roots from and how that style is incorporated into it. Otherwise if you have something to add on a pre-existing one, the you get 3 free slots except for Sun & Moon.
✧ Form ___ :
✧ Form ___ :
✧ Form ___ :
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'N i c h i r i n'
'N i c h i r i n'

^{B l a d e W o r k} : Explain the color, what the color represents, and any other identifiable or noteworthy factors of the sword in which your potato will slay the demons with.
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^{U n i q u e T r a i t s} : List other things that might be important about your apple. Plot relevant stuff not listed in your bio, heightened shounen-protag senses, the power of friendship, anything that you haven't listed above that needs to be put on paper-- one special trait per character. E.g Tanjiro can smell, Inosuke is flexible, etc.

I'd like to thank and credit [@HaHa] for giving me an idea how to "perfect" the sheet

P.S some of you will be marked, good luck.

'O C N a m e'
'O C N a m e'

^{P e r s o n a l i t y} :
What you are?

^{S h o w a S e c r e t} :
Brief backstory, unlike Muzan's demons, Michikatsu's demons keep their memories and aren't bound to a Killswitch, explain why do you side with the new Demon King, etc. one of the reasons as to why many would side with him, is because he treats his subjects better than Muzan do. Being a demon in this age means you're a Yakuza.

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'K e k k ī j u t s u'
'K e k k ī j u t s u'

^{B l o o d D e m o n A r t} : BDA are demon magic, this is self explanatory, you're allotted to 3 "spells".
✧ Signature ___ :
✧ Secondary ___ :
✧ Finisher ___ :
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^{T r a n s f o r m a t i o n} : Being a Demon from Michikatsu's progeny, means that you are in control of what you become, are you a Humanoid? Meaning retaining much of your humanity or are you an Inhuman, yeah that ugly looking, etc. explain the level of your flesh manipulation and flesh absorption.

'Tomioka Guen'
'Tomioka Guen'

^{P e r s o n a l i t y} :
We're really nothing alike. Guen values her personal space, keeping a nonchalant image for the most part. She's quick to pickup social cues and addresses them as unfiltered as possible. Aware of the fact that her words are cold and hurting, this is her way of caring.

^{S h o w a S e c r e t} :
A descendant of the Taishō Era's Water Hashira, like the predecessor before her, a chord of sadness struck her life. Borne into the House of Tomioka, Guen was fated to forge a bloodpaved path & although thankful for having her family intact, she is gripped with sadness, witnessing how others lose theirs. She's even said to be the luckiest person in the corps for having a complete family alongside her luck streak in gambling.

This guiltridden sentiment and perspectives, rushed down like the rabids from the river as she succumbed to negative peer pressure. Guen closed her heart shut and distanced herself from the corps, all throughout her early days until her late fiance came. The previous Moon Hashira, Tsugikuni Hikaru, who's been Guen's anchor for seven years has died recently, specifically on the day of their wedding. Interrupted like as if fate was just that cruel, Guen finally felt loss that's directly related to her & not so long months after, she felt a tide of vomit down her throat, when she's told of her miscarriage. Eventually, Guen wallowed in depression, so much so, avoiding Hikaru's little sister, blaming herself for his death.

Despite her indifferent attitude towards her peers, she's the leader of the Hashira.

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'K o k y ū'
'K o k y ū'

^{F l a m b o y a n c e} : Guen is a practitioner of Water Breathing & the Water Hashira of her era, just like her predecessor, who've created the 11^th Form — Guen created a 12^th Form.
✧ Form 12 : 滝七連舞 | Taki Nanarenbu (Waterfall, 7 Slices Dance)
Guen created the 12^th Form to fully conceal her presence in a microsecond & rush down like a Waterfall, all attacks are nullified as she uses the footwork of Thunder Breathing & inspired by Dead Calm's lull, foes may hit a mirage, as the real one is circulating 7 consecutive hits to the vitals — throat, solar plexus, heart, stomach, groin, kneecaps and wrists, in no particular order, and while she's doing so, foes have no way to deal damage against her.

Breath of The Cold |【冷の呼吸】 (Rei no Kokyū) is among the numerous derivatives of the Breath of Moon. Thematically, the cold sends shivers to ones spine, playing the intimidation tactics of foreboding bloodlust. It's coldblooded like the sweet serving of revenge, best when it's cold, it is Guen's recently developed Style.

Although it seemed like an irrational walking death wish for the users, it's more-so paradoxical. The Breath of The Cold is vaunting while also taunting – it incites fear as so does challenge. Once foes are drawn towards the fowler's snare, it is likened to; a once noisy forest, followed by sudden dead silence. Before anything else, one has already fallen prey, realizing it too late, as the hunter becomes the hunted and the vulnerable, devoured.

Leaving only the Breath of The Cold-user, looking that of a Jaguar that successfully got its hunt.

The Breath of The Frost, employs the most offensive swordsmanship in Japanese History, the Jigen-Ryū Kenjutsu, it has a total of 4 Forms.
✧ First-Blood — Wildhunt, Prowler【荒狩、夜の泥棒】(Arakaru, Yoru no Dorobō) is a Jigen-Ryū Kenjutsu form. Apparently inspired by the Japanese Legend of what's the swordplay, the Shinsengumi, feared. From the silence, comes a visceral warcry meant to confuse foes, followed by an assault barrage of erratic sword swings. It is bound by a singular purpose; ending the lives of foes while disregarding your own. The form prior release is assisted by 4 consecutive, enhanced recovery breaths as it acts as a delayed mechanism for the user to endure incoming hits while striking their enemy.
✧ Form ___ : The other 3 forms are story locked, TBR.
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'N i c h i r i n'
'N i c h i r i n'

^{B l a d e W o r k} : Guen wields a Nodachi with a darkblue blade, so blue that it has no hues, often mistaken as a black blade. The aura it radiates is so cold, many refrain from even touching or looking at it. For Demons, it is foreboding.

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^{U n i q u e T r a i t s} : Guen is a Marechi, her blood is intoxicating to Demons.