Side note: The Breathing Styles aren't mine

Optimus Prime (Ayato Eiji) Student of the former Water Hashira
OPTIMUS PRIME ABILITIES:
First Form: Shooting Star
A high speed attack where the user is covered in a white light and shoots forward for a fast slashing attack

Second Form: Solar Flair
The users blade is cloaked in red and orange light becoming super heated and burning anything the blade touches, in addition it gives a somewhat of a sword beam as slashing at open air will cause the sword to shoot plasma(like the master sword)

Third Form: Brown Dwarf
Thrusting the sword into the ground(or downward in general) causing an impenetrable shell of brown light to surround the slayer an anyone immediately next to them. It will block most any attack but the slayer isnt able to move while it is activated.

Fourth Form: Rainbow Nebula
A mercy strike similar to "gentle rain after a drought" it is painless and causes a sparkling rainbow particle effect as if one were falling asleep in a sea of stars.

Fifth Form: Rings of Saturn
The user spins with their blade causing debris (and enemy attacks if timed correctly) to get picked up and follow the blade tip, flying in a straight line in which ever direction the blade is swung at the end of the attack. The longer this form is held the more powerful it becomes.

Sixth Form: Dance of Fallen Stars
Similar to "dance of rushing river" the more consecutive blade swings you do the more powerful each strike becomes.

Seventh Form: Morning Star
The swordsman executes rotating slashes which produce thick and wide, stationary shockwaves around the user that serves as defense from incoming attacks.

Eighth Form: Flare Star Chaos
The swordsman consecutively performs 6 thrusting actions that target their opponents vital parts.

Ninth Form: Serene Daybreak
The user uses their weapon to their full power after gaining energy and momentum in her body and slash through the target. This attack would leave a deadly burning effect for about 2-3 minutes.

Tenth Form: Ethereal Projection
The user quickly lunges in different directions around her opponent and use her sword to slash them several times while they are unaware.

Eleventh Form: Atmospheric Illumination
The user strike his opponent multiple times sending shockwaves of light that grow increasingly stronger with each hit. This shockwave is capable of disorienting and even immobilise anyone hit.

Twelfth Form: Golden Full Moon
The user repeats the following forms except the secret form in order 1st to last until sunlight when her opponent burned or was killed during the fight. As the sun comes up, the user released red, orange, and yellow smoke.

Thirteenth Form: Galaxy Light
Similar to Solar Heat Haze, the user charges towards the target, unleashing a horizontal slash apparently disguised in haze that fails to land, but actually precisely hit the target.

Final Form: Everlasting Light
The user jumps towards they're opponent from above and decapitates them in an elegant but peaceful way, having them see a beautiful sunset.

SECONDARY BREATHING TECHNIQUE:
First Form: Water Surface Slash
The user generates enough momentum to create a powerful single concentrated slash.

Second Form: Water Wheel
The user leaps and vertically spins forward in the air while releasing a flowing attack in a circular motion.

Second Form: Improved, Lateral Water Wheel
An alternate variation of Second Form: Water Wheel created by Tanjiro Kamado that unleashes a horizontal spin instead of a vertical one.

Third Form: Flowing Dance
The user swings and bends their blade in a winding motion along with their body and dances in a flowing pattern, slicing everything in its path.

Third Form: Flowing Dance, Shadows of Dawn
The user covers their blade in water before unleashing a series of circular rising slashes in a flowing motion from multiple directions before delivering a powerful downward slash

Fourth Form: Striking Tide
The user makes multiple consecutive slashes while twisting their body and sword in a flowing fashion to deliver multiple blows simultaneously.

Striking Tide, Turbulent
An improved version of the Fourth Form: Striking Tide. The user increases the quantity of consecutive strikes and slashes along with improving its accuracy in order to contact a specific target during a chaotic situation.

Fifth Form: Blessed Rain After the Drought
The user changes the grip on their sword and decapitates the opponent in a single flowing strike that causes little to no pain. It is a "sword strike of kindness" used when the enemy willingly surrenders.

Sixth Form: Whirlpool
The user fiercely twists their upper and lower body, creating a whirlpool of air that cuts anything caught in it. Its effect and efficiently is enhanced underwater, where the user can draw water around their weapon to enhance their slashes.

Whirlpool, Flow
A combination of Third Form: Flowing Dance and Sixth Form: Whirlpool created by Tanjiro Kamado. The user combines the footwork from Flowing Dance and the twisting movements of Whirlpool, performing an attack around the user that conjures a twisting, swirling, vicious flow of water to redirect projectiles from multiple angles.

Seventh Form: Drop Ripple Thrust
The user performs a fast and accurate stab, capable of reducing the impact of a moving target.

Drop Ripple Thrust, Curve
A modified strike that hits from a specific angle corresponding to the sword's structure which nearly nullifies the impact and momentum of a moving object.

Eighth Form: Waterfall Basin
The user cuts the target vertically in a flowing motion which is most effective when they are falling downward.

Eighth Form: Waterfall Basin, Destruction
The user leaps forwards towards their enemy in a spinning motion and slashes them as they past. They then turn around and leap behind the enemy to slash them with a curved strike, before uppercutting them while leaping high into the air and then falling down with great force in a overhead strike, smashing the enemy to the ground and unleashing multiple gargantuan waterfalls that pulverize their opponent.

Ninth Form: Splashing Water Flow, Turbulent
The user changes their footwork in a way that minimizes the landing time and surface needed when landing, allowing the user to move without limits. Ideal when fighting in a place with no solid foothold.

Ninth Form: Splashing Water Flow
The user rushes around their opponent discombobulating them in multiple circles forming a vortex-like flow of water. They subsequently leap over their opponent delivering an overhead slash summoning a large wave crushing them afterwards.

Ninth Form: Splashing Water Flow, Flash
The user rushes towards their opponent seemingly appearing like teleportation and unleashes a powerful uppercut-like slash.

Ninth Form: Splashing Water Flow, Turbulent Effervescence
The user rushes forward turbulently and unleashes numerous flowing water slashes from all directions while creating levitating bubbles all around their enemy. Afterwards, they leap away from them and cause all the bubbles to pop, releasing a heavy pressured burst of water spewing in all directions, dealing massive damage to their opponent.

Tenth Form: Constant Flux
The user performs a continuous flowing attack which seemingly takes the form of a water dragon that increases in strength and power with each rotation due to momentum.

THIRD TECHNIQUE:
Blood Demon Art: Cosmic Tear
Blood Demon Art: Distorted Space

Akemi Hana (Flame Hashira Tsuguko) Light Breathing User
FLAME BREATHING BORROWED FORMS:
First Form: Unknowing Fire
The user charges towards their target at high speeds and unleashes a singular slash that aims to decapitate them.

Second Form: Rising Scorching Sun
The user releases an arching sword slash upwards.

Third Form: Blazing Universe
The user swings their blade downwards in an arc.

Fourth Form: Blooming Flame Undulation
The user swings their blade in a circular motion that is used to defend from incoming attacks or slash multiple targets in one swoop.

Fifth Form: Flame Tiger
The user performs a series of powerful sword slashes that seemingly takes the form of a flaming tiger.

Sixth Form: Sky-Piercing Fire
The user unleashes a thrust attack that can reach the sky.

Seventh Form: Blaze Release
The user is envolved by flames and unleashes a side attack that releases the charged attack in the opponent, obliterating it.

Eighth Form: Underworld Eruption
The user unleashes a downwards attack that slices the opponent's throat.

LIGHT BREATHINGS:
First Form: Reflection
The user deflects an attack and sends it back at the enemy by twisting and angling their blade.

Second Form: Refraction
The user rushes towards the enemy at high speed, blade drawn. When they are two steps away from the enemy (or if the enemy gets sufficiently alarmed and is about to counter), they suddenly appear to slow down a great deal. This fools the enemy into thinking that either they are seeing things slower due to adrenaline, or the user has suddenly become weakened, which prompts them to let their guard down. When this happens, the user suddenly speeds up again and beheads the enemy in a flash.

Third Form: Blinding Light
Works best with a full moon. The user reflects the light of the moon by angling their blade in a single movement and temporarily interferes with the enemy's vision.

Fourth Form: Fool's Vision
The user swings down, but the attack somehow ends up coming from below instead. Has a horizontal variation that works similarly.

Fifth Form: Fading Firefly
The user uses their surroundings and speed to appear as if they're fading in and out of the enemy's view. Normally used in conjunction with other forms.

Sixth Form: Moonbow
An arched slash. The user continuously shifts the tempo of their body to appear as if they're performing the attack in slow motion, only to speed up immediately when it comes to delivering the slash.

Seventh Form: Sunburst
A technique inspired by the Breath of Thunder. The user reinforces their legs with their breathing and dashes forward at unprecedented speed with their sword raised and ready to strike down. Very similar to the Breath of Thunder's Thunderclap Flash, but the main differences are that this is not a battojutsu technique (the sword is already unsheathed) and it's not as fast as the form it's inspired by. The easiest form in this breath to learn because of how straightforward it is compared to the others.

Eighth Form: Luminous Purge
The user moves in a spinning motion around the battlefield while swinging their katana, almost as if dancing, while using the Fifth Form: Fading Firefly to confuse the enemy. The directions of the spin change sporadically to create further confusion.

Ninth Form: Gleaming Revelation
Starts with the combination of the Fifth Form: Fading Firefly and Sixth Form: Moonbow. The user then disappears right before the slash hits the enemy and they somehow appear behind them while in the air. Then they finish with a slash that hits from a completely different direction from the one they swung at, landing right after beheading the enemy.

SECRET STYLE:
1st form: Flash
A linear slash of light.

2nd form: Blinding Blast
A very powerful downward slice that completely destroys whatever is below it.

3rd form: Solar Flare
The user swings the sword in a wide arc, releasing a powerful slice in a circular shape around the user.

4th form: Edged Light
An upwards slice, capable of defending against a large scale attack.

5th form: Bright Blaze
The user swings their sword in a large arc over their head to in front of them, creating a large and uncontrolled slash, decimating anything in front of the user.

6th form: Shining Barrage
The user makes quick and linear attacks in rapid succession by propelling forward, striking, making an extremely sharp turn, and propelling again, then repeating.

7th form: Holy Strike
A strike that is used to kill a target with no pain. Primarily used on an enemy who surrenders as this attack is not viable against an aggressive enemy as it is slow and easy to block.

8th form: Light Refraction
The user performs a linear slice with sharp turns in it, allowing the user to weave the blade under defenses.

9th form: Light Dispersion
The user creates 6 separate controlled slices. If done repeatedly, it can increase the attack speed of the user by 6x and make the opponent feel as though 6 people are fighting them at once.

10th Form: Parhelion
The user launches at the opponent with blinding speed, but right before reaching their opponent, jerks their body into the air to create an afterimage and appear to have vanished. The user then performs a 360 degree attack above their opponent followed by a second vertical slash straight through their opponent and lands behind them, ideally slicing off all 4 limbs, decapitating them, and slicing their their torso in half vertically.

11th form: Godlike Upsurge
The most powerful and destructive ability. Once used, the user launches in the desired direction, destroying the ground and nearly anything in their path, and can slice with incredible power. Each slice inflicts devastating damage and can completely annihilate whatever goes against it. The user can perform sharp turns and launch again to regain speed, repeating the attack. This can continue to be used for a short time, but it is extremely tiring, so the user will eventually collapse from exhaustion if overdone.

Megatron (Dark Breathing User)
First Form: Dark Night Slash
The swordsman does a singular slash that can be used to cut the demons head off or just to use as an attack

Second Form: Dark Moon Eclipse:
The swordsman uses their sword in a circular motion to block incoming attacks. This move was inspired after watching a flame breather using blooming flame undulation.

Third Form: Dark Lightning flash
The swordsman charges forward at intense speed for a quick fast attack that is incredibly risky and dangerous to use. After training with a user of thunder breathing this form was created as a quick way to dodge attacks or a quicker more powerful strike in one go.

Fourth Form: Night Strike
The swordsman uses a full power strike that can cause serious damage to demons even those of the twelve Kizuki. If red blades are used with this move it could even cause the upper moons have a hard time using there regeneration.

Fifth Form: Blackout
The swordsman moves quickly and makes it seem as if the entire area is showered in darkness.

Sixth Form: Constant Darkness
The user attacks with consistent strikes that gain more power as each attack happens. This will allow for more powerful strikes well keeping a constant pace around a demon.

Seventh Form: Starry Night enveloped by darkness
This attack is a mercy killing for a target that also makes them atone for the sins of their past. Killing a demon well making them feel little to no pain in death but still making them atone for their sins in this life.

Eighth Form: Dark Vortex
The swordsman swings their blade in a circular rotation similar in appearance to the Flame Breathing, Fourth Form: Blooming Flame Undulation. However, instead of blocking enemy attacks or beheading multiple demons, the swordsman changes the grip so the current of air sucks in enemies to close in on distance in order to give a chance to behead the demon.

Ninth Form: Fallen Rainbow
The swordsman slashes the enemy three times while hooking the opponent's clothing with the blade. The swordsman then throws the opponent upwards and leaps into the air while performing a half-circle slash on the enemy mid-air, then slamming the enemy to the ground.

Tenth Form: Dying Light, Dusk
The swordsman performs three thrusting strikes which send large, high-pressured blasts of energy towards the enemy.

Eleventh Form: Ever-Dimming Strike
The swordsman uses the sword to make winds irritate the opponent's eyes and eardrums, blinding and deafening the opponent temporarily to some extent. The swordsman then takes advantage of this by blitzing the enemy, which is followed by a large outburst of energy striking the opponent.

Twelfth Form: Dying Crescent Moon
The user releases gold dyed smoke and swings her sword rapidly in two gigantic crescent slashes, which forms a storm of smaller crescents spread. This technique causes huge destruction in a large area (it also leaves golden smoke and dust everywhere).

Thirteenth Form: Deathly Morning Stars
The user releases gold and red dyed smoke as they runs around their opponent making a star shape around their opponent with the dyed smoke, this form is used to mainly poison the opponent weakening them.

Final Form: Purple Eclipse
The user releases purple dyed smoke out of their sword and uses light speed to run towards their opponent and delivers 13 rotational sword slashes.

Demon Ability
Blood Demon Art: Burning Dark Flames