Kairi Uchiumi

**Kairi Uchiumi** (内 (うち) 海 (うみ)  乖 (かい) 離 (り) , *Uchiumi Kairi*?) is the Ocean Hashira (海 (かい) 洋 (よう) 柱 (ばしら) , *Kaiyō Bashira*?) of the Demon Slayer Corps.

## Appearance

Kairi is a beautiful and curvaceous young woman with round, pretty aquamarine eyes and pale skin. She has long black hair the fades into green-blue which she keeps in a low, loose ponytail tied by a blue butterfly hairpin given to her by Shinobu Kochō as a sign of their friendship. She has a kind face and notably deft fingers.

Kairi wears a blue-green tinted version of the standard. Demon Slayer Corps uniform. Her uniform has much longer sleeves reminiscent of a kimono like Muichirō Tokitō's gakuran jacket, and a long, smooth dress that just touches her ankles and exposes the side of her left leg. She wears blue-strapped zori with teal tabi socks and wears a pair of turquoise earrings made from a strange stone in the shape of a ring.

After the battle against Muzan Kibutsuji, Kairi loses her right eye and left pinkie and ring finger.

## Personality

Kairi is a calm and collected person, according to Sanemi. Kairi is also known to be an extremely kind person, as seen when she suggest they hear Tanjiro's side of his story, instead of yelling. She also believes him that his sister had never eaten a human.

Kairi is best friends with Shinobu Kochō, and is devastated by her death. She sees her death in the full when she helps Kanao Tsuyuri open the door, and her rage is like nothing she's ever felt. She is. able to shock even Douma by her strength.

Kairi is usually kind and calm, but gets frustrated easily. But nevertheless, she keeps a smile on her face no matter what.

### Phyiscal Abilities

* **Enhanced Physical Prowess:** As a member of the Hashira, Kairi's physique has been increased to superhuman levels through years of harsh training combined with the use of the **Total Concentration: Constant** (全 (ぜん) 集 (しゅう) 中 (ちゅう) ・常 (じょう) 中 (ちゅう) , *Zen Shūchū Jōchū*?). The members of the Hashira in general have incredible movement speed, all of them have displayed the capability to use blinding bursts of speed that make it seem like they teleported to even talented swordsman like Tanjirō Kamado.
	+ **Enhanced Strength:** While not having the same physical constitution as Gyōmei Himejima or Sanemi, Kairi has still shown insane levels of strength when she was able to cut of Douma's head in one go.
	+ **Enhanced Endurance:** Kairi survived many of Douma's Blood Demon Art attacks and has even took many of them to defend Inosuke and Kanao. Kairi's endurance was shown most efficiently during the second fight against Muzan where she was able to stand her ground even when being injected by Muzan's blood from his attacks.

### Mental Abilities

* **Enhanced Mental Prowess:** As a seasoned swordsman who underwent incredibly harsh and intense training, Kairi possesses above average mental capabilities. She could process information and think clearly at supernatural speeds, proven by fighting Upper Rank Demons, who can think at equally or slightly faster speeds. As another testament to her mental capabilities, she has incredible concentration abilities and wits. With an arsenal of techniques at her disposal, Kairi has to be really decisive and sagacious when using them, proven when she could hold her own against "an Upper Rank" and Muzan Kibutsuji himself.
	+ **Keen Intellect:** Kairi is one of the most intelligent and clever Hashira ever. This is especially shown during the fight against Douma, when she assesses the meaning and use of his Blood Demon Art, shown when she realises that the two humanoid figures can record and save their moves.

### Supernatural Abilities

* **Demon Slayer Mark:** During her battle against Upper Rank Two, Dōma, Kairi had unconsciously awakened and obtained her Demon Slayer Mark. Her Demon Slayer Mark takes the form of a sort of blue-green wave pattern winding from her right arm around her left leg. When it manifested, Kairi's physical strength, endurance, precision and overall power increased immensely to the point she was able to stand on equal grounds against Dōma.
	+ **Bright Red Nichirin Blade** (赫 (あか) く日 (にち) 輪 (りん) 刀 (とう) , *Akaku Nichirin Tō*?): During the fight against Muzan, Kairi grips her blade so hard it turns red, giving it the ability to hamper the enhanced regeneration of Demons.
	+ **Transparent World** (透 (す) き通 (とお) る世 (せ) 界 (かい) , *Sukitōru Sekai*?): During the battle against Dōma, Kairi gained access to the "Transparent World". While being in this state, Kairi is able to see the bloodflow, joint movement and muscles of her opponents, especially Muzan's twelve vital organs (seven hearts and five brains).

### Swordsmanship

**Ocean Breathing** (海 (かい) 洋 (よう) の呼 (こ) 吸 (きゅう) , *Kaiyō no kokyū*?): A Breathing Style created by Kairi's parents, derived from Dance of the Ocean Spirit, created by Kairi's ancestors when they were Demon Slayers. Kairi made the Twelfth Form, collaborating with Shinobu Kochō. It is utilised by Aomi Uchiumi and **Kairi Uchiumi**.

1. **First Form: Air of Salt** (壹 (いち) ノ型 (かた)  虚 (くう) 氣 (き) 鹽 (えん) , *Ichi no kata: Kūki'en*?) - The swordsman powers up their legs and runs in a blinding flash of speed.
2. **Second Form: Colossal Wave** (貳 (に) ノ型 (かた) , *Ni no kata:*?) - The swordsman jumps up high and slashes downwards, once.
3. **Third Form: Raindrops of the Ocean** (參 (さん) ノ型 (かた) , *San no kata:*?) - The swordsman slashes their sword three times so quick it looks like one slash.
4. **Fourth Form: Typhoon at Sea** (肆 (し) ノ型 (かた)  颱 (たい) 風 (ふう) 沖 (おき) 合 (あい) , *Shi no kata: Taifū Oki'ai*?) - The swordsman swings their sword five times in any direction.
5. **Fifth Form: Lull of the Ocean** (伍 (ご) ノ型 (かた) , *Go no kata:*?) - The swordsman quickly swings their blade cleanly, ensuring no pain, but content to the opponent.
6. **Sixth Form: Lullaby of the Ocean Goddess** (陸 (ろく) ノ型 (かた) , *Roku no kata:*?) - The swordsman twists around their opponent, slashing their sword as they do so.
7. **Seventh Form: One's Demise in the Ocean** (漆 (しち) ノ型 (かた) , *Shichi no kata:*?) - The swordsman stabs their opponent three times.
8. **Eighth Form: The Serene Wave** (捌 (はち) ノ型 (かた) , *Hachi no kata:*?) - The swordsman slashes their sword diagonally.
9. **Ninth Form: High Tide** (玖 (く) ノ型 (かた)  満 (みち) 潮 (しお) , *Ku no kata: Michishio*?) - The swordsman strikes upwards.
10. **Tenth Form: Low Tide** (拾 (じゅう) ノ型 (かた)  旱 (かん) 潮 (しお) , *Jū no kata: Kanshio*?) - The swordsman strikes downwards.
11. **Eleventh Form: Ocean's Impact** (拾 (じゅう) 壹 (いち) ノ型 (かた) , *Jū Ichi no kata:*?) - The swordsman strikes their opponent as much as they can in 3 seconds.
12. **Twelfth Form: Tsunami** (拾 (じゅう) 貳 (に) ノ型 (かた)  海 (つ) 嘯 (なみ) , *Jū Ni no kata: Tsunami*?) - The strongest form of the Ocean Breathing, made up of all the forms in order.
13. **Thirteenth Form: Ocean's Poison** (拾 (じゅう) 參 (さん) ノ型 (かた) , *Jū San no kata:*?) - A personal creation of Kairi, she slashes her sword but injects Wisteria Poison into the opponent as she does so, so that they cannot regenerate the lost limb/head.