User:Le nice username./Ocs

OC #1
Seiko Kibutsuji (聖子 鬼舞辻) is a former demon king and the former leader of the twelve kizuki, he was also older twin brother of the current demon king, Muzan Kibutsuji.

It's was revealed that Seiko is of the same bloodline as the Ubuyashiki Family, same as Muzan

Appearance
Seiko was a slim tall man with pale skin, he had long black to light pink to white hair and sharp, hooded-shaped eyes. His irises are cat-like in appearance and colored Pale purple to white long eyelashes.

In his first appearance, He wore sakura kimono lolita dress, Vintage 1950's Japanese Pagoda Carved Wood/Wooden Heel Sandals, Lolita Goddess Needle Head Bride Crown Beaded Chain Crown Baroque Crown,and Dainty Cherry Blossoms Dangle Stud Sterling Earrings

Before he found a two blue spider lily, then randomly eat it, he wore a bamboo Hat with a chiffon Veil, Traditional Japanese Kimono Robe Cotton with Long sleeves, and Traditional Geta Shoes.

Personality
Seiko is a depressed outwardly friendly, gentle, calm, incredibly intelligent individual, and described to talk, when Around kibutsuji Muzan, Seiko would act nice and soft. If you greet Seiko without Muzan around, he'll be completely different, his personality will be changing to a joyous personality but also rather calm and generous. a demon who wants to share love everywhere in this worthless world! but he might be serious and sensitive sometimes. He can also be clumsy, hyperactive, and cheerful too.

if he sees kaigaku, he's will be manic, ecstatic, and more insane, this makes kaigaku speechless that muzan had to put his older brother in jail (aka Seiko's unused room, he hates his room)

Abilities
Overall Abilities: As the first formerly Demon King, Seiko is the strongest demon in existence. he had battled numerous Demon Slayers and obtained vast experience and knowledge of combat. He was able to decipher the techniques and skills of Michikatsu Tsugikuni and Former Wind Hasbira. His physique is one of the most polished and immense in the existence.

Demonic Blood: Seiko develops blood with special mutagenic properties that can transform humans into creatures known as demons. His special blood also seems to give rise to a plethora of special abilities to those that assimilated his blood such as powerful and quick regeneration, the power to control the flesh, immortality, an accelerated growth rate, enhanced physical prowess and even supernatural abilities called Blood Demon Arts.

Seiko can also further empower a demon by giving more of his blood, enhancing their pre-existing abilities. However, this is limited to how much blood the recipient can withstand and adapt to. If a human were to take in too much blood from Seiko, their body would mutate faster than they can withstand, causing them to self-destruct into one giant mass of flesh before disintegrating into ash. Genius Intellect: As a Formerly Demon king, Seiko was shown to manipulate them to do his bidding without them realizing at all. Having lived for over a millennia and gained further experience from the telepathic link with demons he controls, Seiko is extremely clever and erudite. Since he has 8 fully functioning brains, it would most likely boost his intelligence and other mental capabilities such as memory and cognitive processing, he has also used demons to create distractions somewhere far away when he wants to hide something from the Corps, (yes i copy paste from muzan kibutsuji wiki website because i'm just a stupidz person)
 * Demon Curse: Seiko places a curse on all demons that have assimilated his blood. If any demon mispronounces his first name "Seiko" out loud, the curse activates, which causes their bodies to stop regenerating and giving a bad luck for 120 years, However, if they keep mispronouncing his first name out loud, their bodies will stop regenerating and allowing Seikos cells inside the demon to take over and kill them, regardless of their original intent.
 * Telepathy: Seiko has the ability to read the thoughts of those that he has shared his blood with by looking at them and thinking about them, he also can send telepathic messages and have full conversations with other demons as well, Seiko has also stated he can sense the location of all demons that he has shared his blood. However if they further away they are from him. the normal difficulty it will be for him to interact and track them. He is also able to see through the senses of other demons.

Immeasurable Speed & Reflexes: As a Formerly Demon king, Seiko still had tremendously fast levels of speed, possessing movement speed and reflexes that surpass any demon or the uppermoons of the twelve kizuki, Seiko was blessed to be rather light which allowed her to move easier. This combined with his leg strength made him very fast and with his enhanced hearing he can hear incoming attacks and easily avoid them. He was also able to strike both Former Flame Hashira and Water Hashira before they even noticed he was there.

Conveyance: This ability to teleport allows Seiko to immediately disappear and reappear in another location. Seiko is only able to teleport if the destination is already predetermined in their head. They are also restricted to a specific area surrounding them, which is said to be around 50 yards. Seiko can teleport with things they are carrying or wearing and may vanish in the blink of an eye. their teleportation is very instantaneous. Additionally, they have the ability to transport others along with them as long as they are in close proximity to one another.

Enchant: Seiko can inhabit or take over the body of other beings. Seiko may or may not have to leave their own body for this to take place. Disembodied users such as spirits may use the body as their own. A powerful enough Seiko may not even be limited to inhabiting other entities, but inanimate objects, structures or environments as well.

Sunlight Resistance: After randomly eating 2 blue spider lilies, Seiko developed immunity from sunlight, a feat thought impossible for demons, With this immunity to sunlight, he is able to completely walk and go about in the daytime without being burnt to ash, However, he barely goes outside because his brother cannot immunity from sunlight. So he decides to not go outside when it's a day-time

Blood Demon Art
Ancient Light Deception: His Blood Demon art is smiliar to kokushinbo Ig (HE'S COPY KOKUSHIBO'S BLOOD DEMON ART, I REPEAT Y'ALL, HE'S FCKING COPYING KOKUSHIBO'S BLOOD. DEMON. ART!!!) Seiko's Blood Demon Art allows him to create and manipulate dozens of sharp blades shaped like traditional Sirius/Stars from his katana. They are implied to be created from his blood and can be either a bright yellow or a bright blue in color. These Sirius/stars blades are extremely chaotic, constantly changing in size, length and speed, making Seiko's attacks extremely unpredictable and unreadable as they have no set pattern. This Blood Demon Art greatly enhances the power of his techniques, making every single one of his sword swings extremely deadly and dangerous. He also seems to be capable of using his Blood Demon Art as long as his katana is unsheathed.

Techniques

 * Lunar Wind (月の風 　 Tsuki no kaze?) - Seiko plunges their katanas into the ground. They gently place their hands over their eyes and close them, blocking out all other distractions. The user grabs the hilts of their swords, unleashing a devastating attack with their built up energy.
 * Planetary Impact (惑星の影響　 Wakusei no eikyō?) - Seiko thrusts his katana into the ground, sending rocks flying everywhere. Seiko manipulates the shadow of the rocks to control the rocks, and slashes the rocks into bits, sending the rocks at the target.
 * Honorable Stars (名誉ある星　Meiyo aru hoshi?) - Seiko spins in a horizontal, circular motion creating a shadownado that revolves around the user for a short amount of time.
 * Comet Flash (拾じゅうノ型かた　 Jū no kata:?) - Seiko darts forward at their opponent, making several swift and strong piercing stabs, lacing their opponent's wounds with wisteria poison. With each consecutive stab, their wounds began accumulating more and more wisteria poison, eventually killing their enemies. Best used on lower-ranked demons.
 * Dark Matter (暗黒物質 　Ankoku busshitsu?) - Seiko kicks onto a surface, leaping themselves into the air. While airborne, they spin along with their katana, aiming for the eyes of their opponent, blinding them temporarily before mercilessly beheading their enemy.
 * Dead Star (漆しちノ型かた　 Shichi no kata: ?) - A technique designed to control crowds and deal with multiple opponents. Seikolunges from current position and throws a series of direct connected slashes in order, similar to Thunderclap and Flash. Even more similarly, seiko is able to chain these blows in the form of various constellations. Therefore, several different versions of this form can be accessed and used depending on the exact situation.
 * Dark Star (ダークスター 　 Dākusutā?) - Seiko grips and swings their katana in such a way that, when it either strikes the opponent or something connected to them, the force of the impact and accompanying vibrations cause the opponent to undergo either hemispatial neglect or outright sensory deprivation. A flurry of this strike can be launched all at once, which, if successful, will plunge the target into a seeming void. This technique works just as well against humans as demons and skilled-enough seiko can duplicate its effects - if at a smaller scale - with their own bodies, causing a flick to be enough to temporarily disorient the target.
 *  Sword of punishment(罰の剣　  Batsu no ken?) - Seiko creates several large light swords, multiple giant mirrors around a target. The swords are launched at the target and the mirrors reflect the swords back so that they hit the target multiple times.
 * Sugiyama Eternal(杉山永遠 　  Sugiyama eien?) - Seiko swings performs an advanced sword swing and rushes towards the opponent, if the opponent tries to attack then the user changes the Air Flow and dodges the attacks, then jumps in the air and delivers a horizontal strike and a vertical strike. After this the user takes his dagger out and throws it towards the enemy, then performs the First Form : Lunar wind.
 * Black Star(黒星 　  Kuro Hoshi?) - Seiko casts a sphere of magic around themselves. The sphere flattens out and transforms into countless light blades as it increases the size. Upon completion, the blades automatically aim for those below and rain down on them.

Equipment
Standard Nichirin Katana: As a Formerly Demon king, Seiko carries around a standard sized and shaped Nichirin katana that is signature White lavender in color, as his primary weapon. It is the same as any katana from the handle to slightly above the hilt, Seiko's sword tsuba is shaped like a cherry blossom with a light shell pink core and dark antique mauve border, Seiko has the words Destroy Demons (Akki Messatsu) engraved on the side in White lavender. With his katana.

Bro randomly stoles Someone's Katana

Crimes That Has Been Done
he didn't nothing wrong y'all, he's just in foolish/silly mood
 * Mass murder (inc. child murder)
 * Unlawful human mutations
 * Genocide
 * Malefic
 * Man-eating
 * Cannibalism
 * Abuse of power
 * Mutilation
 * Terrorism
 * Physical and psychological abuse
 * Domestic abuse
 * Suicide inducement
 * Torture
 * Treason
 * Corruption
 * Brainwashing
 * Assault
 * Conspiracy
 * Usurpation
 * Blackmail
 * Stalking
 * Fraud
 * Theft
 * Attempted world domination
 * Arson
 * Violation of curfew
 * Assault
 * Vigilantism
 * Animal Cruelty
 * Breaking and entering
 * Drug dealing
 * False accusations
 * Hate crimes
 * Slander
 * Blackmail
 * Vandalism
 * Disturbance of peace
 * Fraud
 * Neglect
 * Child Endangerment
 * Attempted Murder
 * Death Threats
 * Coercion
 * Kidnapping
 * Doxxing
 * Property Damage
 * Forced adoption

Trivia

 * Seiko has the same Japanese actresses as Milk cookie from Cookie run kingdom
 * His Favourite Pillar is Kyojuro Rengoku, He's Secrelty put a Red Spider lily in the chest when he's asleep.
 * The reasons why he has a girl name, because his mother thought he was a girl.
 * The Ubuyashiki family are descendants of Muzan And Seiko's original blood relatives, who, due to the family having birthed the original demon, were cursed with an unknown incurable and untreatable recessive genetic disease that has killed each and every family member—both past and present—before they could reach the age of thirty.

OC #2
Akemi was demon formerly affiliated with the Twelve Kizuki, having previously held the third highest position of Uppermoon 3 (上じょう弦げんの参さん Jōgen no San?), before Muzan Kibutsuji excommunicated her for not eating human 10 days.

Before Akemi become a demon, she was a a Demon Slayer of the Demon Slayer Corps and the Former ice hashira

Appearance
Akemi was a tall, curvaceous, and slender woman with plum blue eyes, and pale skin. she has long black fade into a blue near the ends, parted in the center and worn braided back into a large low bun.

Akemi wores blue samurai Armor, and Oni Samurai Mask, The kanji for "Upper Rank" (上じょう弦げん Jōgen?) was engraved in Akemi's left eye and the kanji for "Three" (参さん San?)" is etched across them, and they were shaped to slope downwards towards the sides of her face

before she turned into a demon, akemi was a average height curvaceous, and slender woman with Brown eye, akemi wores the standard predominantly black Demon Slayer uniform along with a black fade in to white haori consisting of a gakuran jackets, a white belt around her waist and tattsuke-hakama pants and a bamboo hat.

Personality
Akemi is a quiet woman that never talks to people, if someone tries to talks her, she just walk away from someone that tries start the conversation with her, she is shown to not do too well and also not interesting with social interactions, and dislikes any people she never knows by close contact. However If she tries speak to someone she knows, Her tone of voice is very cold and to other people it sounds like she doesn’t care but deep inside she does.

However, Akemi will possesses an entirely different personality when dealing against weak demons or any weak demon slayer. She calls them names and mocks them, which is extremely rude and demonstrates her genuine hatred for them.

Abilities
Overall Abilities: As the former holder of the third highest position in the Twelve Kizuki, Akemi is an extremely powerful demon, can able to defeat any weak demon slayer, and numerous Hashira as well as countless Demon Slayers in the past. Akemi possesses incredible abilities and attributes after received a larger amount of blood from Muzan Kibutsuji than a regular Demon which allows her to possess incredible amounts of power, Before she turn into a demon akemi is a very powerful swordswoman and is considered to be third of the strongest Hashiras in all history of the Demon Slayer Corps.

Immense Speed & Reflexes: Before she turning into a demon, Akemi is extremely fast enough to knock out multiple targets without them noticing, When Akemi found Upper Rank 5 and tries to fight akemi, She is able to outpace their normal attacks, that she ended up forcing the Upper Rank to Accidentally using their Blood Demon Arts on Akemi. She also could easily dodge all of the Hashira when she accompanied Muzan to the Demon Slayer Corps Building. She could outpace Kanaes techniques with ease and dodge Sanemi's attacks. He could also blitz Akira Gushiken, who's breathing form was made for speed.

Immense Strength: Akemi was extremely strong, and possesses a level of physical strength superior to average humans, and even matching that of Giyuu, Kyojuro, Uzui, And Sanemi. In terms of arm strength, she was able to hold off one of Uppermoon 3 for a fair amount of time. As for her leg strength, in the Swordsmith village arc, she was able to jump high distances really quickly.

Immense Regeneration: As an Upper Rank demon, Akemi possesses one of the most incredible regenerative abilities in the series due to assimilating a massive amount of Muzan's blood, which she displayed constantly. She was capable of instantly recovering from slash wounds both minor and severe and even limbs slashed off by her opponents with little effort.

Genius Intellect: She's Smart, That's All I have to say. Akemi has displayed the ability to be incredibly sagacious and analytical while fighting Demons, being able to discern their abilities and find the proper countermeasures. She has gone through intense training and battle situations, allowing her to develop incredible tactical intelligence and wits, Akemi demonstrates this by easily defeating both Lower Moon 3 and Lower Moon 4 by figuring out their Blood Demon Art. Her combat tactics are often remarked as a genius with expert intellect.

Fighting Style
Master Swordsman: As a Hashira of the Demon Slayer Corps, Akemi is incredibly skilled in Katana as shown during her battles against the Demons, And also one of the most powerful and skilled swordsman

Breathing Styles
Ice Breathing - ( The style mimics the effects sub-zero temperatures have on objects, specifically the causing of hypothermia and freezing over wounds. Most, if not all techniques involve lowering one's body temperature to sub-zero while still allowing sharp and jarring movements while still being fluid in motion. When utilized properly, the user can envision shards of ice, which are similar in appearance to blue crystals, to seemingly emanate from their weapon, surroundings or themselves, The Ice Breathing combat and breathing style mimics ice and snow, specifically their smooth yet sharp structure and replicates it with the user's movements, speed, techniques and abilities. Most, if not all, known techniques involve the user bending their body, limbs and weapon in both a sharp and soft. ("did you copy this" yes i did. ) However As the Ice Hashira, This Ice breathing personally created and self-taught by Akemi Etsuko herself.

Techniques

 * First form: Ice Slicer (アイス スライサー) - Akemi performs a Risky form By Doing A circular defense attack with slashes appearing everywhere. This will deal a Offense plus defence attack thus, Akemi will gain a Immunity against strong offense blood demon arts which will make the user Immune to some attacks but this form will need focus. If Akemi loses focus the defense will be gone but the slashes will still appear.
 * Second form: Chrominic Shards (ミサイルの破片) - this form is when Akemi leaps into the air and they swing there sword in a moon swinging style launching five Shards of emerald acting as a missile aiming at the enemy.
 * Third Form: Ice Needle (アイスニードル) - Akemi defends against enemy attacks in front of them by making multiple crescent-shaped sword slashes all around them.
 * Fourth Form: First Snowfall (玖ノ型: 最初の降雪) - Akemi injects poison either by kunai or sword to make the opponent see them self in a field with snow beginning to fall. When a snowflake lands on the opponents nose the user slices from behind. Akemi can either make this painful or peaceful.
 * Fifth Form: Freezing Point (参ノ型: 凝固点 ) - Akemi dashes to the enemy with incredible speed. While doing so, they swing their sword around to build up power, much like an avalanche. Upon reaching the enemy, they deliver a single, powerful slash that is enough to decapitate the enemy.
 * Sixth Form: Frozen Waters  (凍った水 ) - Akemi flows back and forth towards his opponent in a disorienting manner similar to snow rolling through the tundra,before executing multiple cuts.
 * Seventh form: Chrominic Shards: (ミサイルの破片) - Akemi leaps into the air and spins their sword in front of them with incredible speed and strength, defending themselves from incoming attacks. If lucky, the attacks can go flying back to the enemy. Once within range, the swordsman delivers either a horizontal or vertical slash, cutting the enemy into half.
 * Eighth Form: Frosty Blade (捌ノ型: 霜刃 ) - Akemi slices in front of them for a defensive move but if a the opponent is close enough then they'll follow up with a sudden stab to the abdomen
 * Ninth Form: Freezing Point (参ノ型: 凝固点) - Akemi thrusts forward, And swings their sword once with such might. It can remove the head of uppermoons, And it freezes the limb, and bodily functions, Causing regen to fail. Akemi also takes some damage from tiring. However this move cant be blocked in any way.

Fighting Style (Demon)
Wakizashi: As a Former Hashira and (former) m ember of Twelve Kizuki, Akemi is incredibly skilled in Wakizashi as shown during her battles against the Demon Slayers. And also one of the most powerful and skilled swordsman

Blood Demon Art
Empyreal-Star: This Blood demon art attribute allows akemi to generate and manipulate stars at will the stars appear as spiky clusters and can individually fire beams of magical light and can be forcibly destroyed. By connecting multiple stars, Akemi can create constellations which generate stronger defenses and attacks. Additionally, Akemi can teleport themselves or others to a spot beneath any star.

Techniques

 * Quartile Hasta(四分位ハスタ) - Akemi swings his wakizashi and converges the light from four stars into a singular beam, generating a larger and stronger attack.
 * Quartile Flagellum(四分位鞭毛) - Akemi extends a line of starlight from their hand and connects four stars. Akemi then swings the line like a whip. The whip is so thin and sharp that it easily cuts through people and walls
 * Quartile Scutum(四分位シールド) - Akemi creates generates of four stars and arranges them into a rectangle. Beams of light connect the stars along the edges of the rectangle, forming a defensive barrier that is capable of withstanding devil-powered magic.
 * Bewitching Moonlight(妖艶な月光) - Akemi creates a small black sphere which strongly pulls in the target. This can be used to disrupt an opponent's movements, creating an opening. Akemi could also create multiple spheres at one time and target themselves, affecting the trajectory of their own movements and making it easier to avoid their opponents' attacks
 * Crescent Cut(クレセントカット) - Akemi holds out a Wakizashi concentrates moonlight at the end, and then launches the moonlight in a crescent-shaped blade. Multiple blades could be launched simultaneously.
 * Crescent Cut Full Moon(クレセント・カット) - Akemi creates a Full Moon Shell and then erratically fires multiple Crescent Cuts from the shield.
 * Laevateinn(レーヴァテイン) - Akemi creates an enormous sword with three points and composed entirely of crystal structures. The blade of the sword itself has a very amorphous surface where it is made out of roughly cut crystals, except for the edges where it has a smooth surface. The sword's guard and grip have a similar texture as the blade with a rough sphere-shaped pommel at the end. Additionally, two large crystals can be seen embedded at the center of the fuller near the guard and the points.

Equipment
side inserted sword: Akemi carried a standard sized and shaped Wakizashi that is deep grey fade to white in color, Wakizashi close to the length of a katana are called ō-wakizashi and wakizashi closer to tantō length are called ko-wakizashi. Wakizashi are not necessarily just a smaller version of the katana; they could be forged differently and have a different cross section.

Trivia

 * Akemi's Canonly Asexuality.
 * Akem's Favorite food is savoury pancake containing a variety of ingredients in a wheat-flour-based batter, And long-standing Japanese custom of eating seven-herb rice porridge
 * girlypop ig