Kaigaku Inadama

Kaigaku Inadama (稲 (いな) 玉 (だま)  獪 (かい) 岳 (がく) , *Inadama Kaigaku*?) (Kimetsu Academy)

## Characteristics

### Race

Demon
 Human (Formerly)

### Eye Color

Turquoise with Black Sclera (Demon)
 Turquoise (Human)

## Affiliation

### Affiliation

Twelve Kizuki
 Demon Slayer Corps (Formerly)

## Debuts

### Manga Debut

Chapter 34 (Human)
 Chapter 143 (Demon)

## Portrayal

### English VA

Alejandro Saab

**Kaigaku** (獪 (かい) 岳 (がく) , *Kaigaku*?) is a supporting antagonist in the Infinity Castle Arc of *Demon Slayer: Kimetsu no Yaiba*. He is a demon affiliated with the Twelve Kizuki, holding the position of **Upper Rank Six** (上 (じょう) 弦 (げん) の陸 (ろく) , *Jōgen no Roku*?), replacing Daki and Gyūtarō after their deaths.

Kaigaku was a former Demon Slayer and Zenitsu's senior disciple under the former Thunder Hashira (鳴 (なり) 柱 (ばしら) , *Nari Bashira*?), Jigorō. However, sometime during Hashira Training, Kaigaku went on a mission and encountered Upper Rank One, Kokushibō, quickly surrendering to him to save his own skin and later becoming a member of the Twelve Kizuki.

## Appearance

As a human, Kaigaku is a muscular young man of average height who has short, spiky black hair, with two thick strands framing his face, and a pair of dull, cold turquoise eyes framed by thick, arched eyebrows. He has an unfriendly face, that is always set in a semi-permanent snarl.

After becoming a demon, he gains many demonic traits like four black flame-like markings on both sides of his cheeks, elongated canines that resemble fangs, sickly pale skin, sharp blackened nails, and pointed ears. By becoming a member of the Twelve Kizuki and rising to the position of Upper Rank Six, his eyes are etched with the kanji of "Upper Rank" (上 (じょう) 弦 (げん) , *Jōgen*?) and daiji for "Six" (陸 (ろく) , *Roku*?).

When he was still human, who is still undergoing training under Jigorō, he is shown to be wearing a black kimono with a white collar, worn loosely to expose his chest and his signature magatama-necklaces around his neck. When he became a Demon Slayer, he wore the Corps' standard uniform consisting of a black gakuran-like jacket, a pair of equally black tattsuke-hakama pants held up by a white belt, tucked into white kyahan wrapped around his ankles, and a pair of tabi socks and zōri.

When he became a demon, he is shown to be wearing his signature kimono secured with a blue obi over his Demon Slayer uniform that has yellow flame-like markings near the chest area. His forearms are seemingly wrapped in kyahan-like material. He also wears multiple necklaces on his neck and wrist with green colored strings that hold together blue magatama-like pendants that were yellow in color when he was human.

### Gallery

Kaigaku's appearance when he was a child.Kaigaku's appearance as a Demon Slayer.
## Personality

Though outwardly brash and arrogant, Kaigaku is in fact cowardly and selfish. Like many orphans living on the streets, he grew up resorting to thievery and other immoral means to survive. He even goes so far as to sacrifice the lives of all the orphans under Gyōmei's care to save his own skin. This has caused him to develop an intense form of self-preservation, often doing what in his own best interest at the expense of others.

At some point after this, Kaigaku met and became the disciple of Jigorō. Because of his great talent with a sword, he was poised to become the next Thunder Hashira. However, unlike other orphans who join the Corps, Kaigaku never developed a desire to slay demons or protect people. When confronted with a stronger opponent, Kaigaku quickly surrendered. Furthermore, he seems to have developed a sense of hypocritical self-righteousness. He called Zenitsu worthless for having no dignity or perseverance and was repulsed at the idea of succeeding Jigorō along with him. Kaigaku also seems to have a twisted perspective of 'right' and 'wrong', believing that those who judge him right (i.e., say he is worthy) are good and those who judge him wrong and have a low estimation of him are evil. Additionally, he also has an inflated ego, viewing himself as a special and gifted person.

In the end, after being beheaded and being at death's door, Kaigaku remains unrepentant and is pleased to know that at least Zenitsu would die with him. However, Yushirō arrives and begins mocking him that he will be given nothing since he never learned how to give, and Kaigaku's fate was sealed once he decided to let his desire inflate and take control of him. Upon seeing Yushirō rescue Zenitsu, Kaigaku screams in anger as the remainder of his body disintegrates.

## Abilities

**Overall Abilities:** As a member of the Upper Ranks, Kaigaku is immensely powerful. Combined with his swordsmanship skills as a proficient Demon Slayer, Kaigaku is an extremely deadly demon. This is supported by the fact that he had to receive a lot of Muzan's blood for him to turn into a demon as users of Total Concentration Breathing are more resistant to the effects of the Demon King's blood. Zenitsu also noted that Kaigaku had eaten a lot of humans in the short period of time between the Hashira Training Arc and the Infinity Castle Arc, further testifying his strength.

According to Yushirō, during Kaigaku's tenure as Upper Rank Six, he has yet to master his techniques and abilities and could have killed Zenitsu immediately in a year's time.

**Immense Speed & Reflexes:** As a Thunder Breathing user turned Upper Rank demon, Kaigaku possesses tremendous movement speed and reflexes due to the Thunder Breathing swordsmanship style placing a heavy emphasis on swiftness and bursts of speed. This combined with assimilating huge amounts of Muzan's blood makes Kaigaku an extremely fast fighter as shown when he could more than keep up with Zenitsu, a Demon Slayer that trained under the same teacher to learn the same Breathing Style, and even overpower him for the majority of their clash.

## Fighting Style

**Master Swordsman:** As the one who was initially supposed to inherit Jigorō's position as the Thunder Hashira, it is implied that Kaigaku is an extremely proficient swordsman with great skill in Thunder Breathing. His swordsmanship is different compared to most Demon Slayers as he places his sword sheath at his back rather than on either side of his waists. Still, his swordsmanship skill could match that of Zenitsu who had previously fought Upper Rank demons. With his Blood Demon Art, Kaigaku's swordsmanship was greatly enhanced as well.

### Breathing Style

**Thunder Breathing** (雷 (かみなり) の呼 (こ) 吸 (きゅう) , *Kaminari no kokyū*?): A Breathing Style Kaigaku learnt from a former Hashira, Jigorō. It was implied Kaigaku was quite talented in learning this Breathing Style, so much so that Jigorō wanted Zenitsu to emulate him. But despite this, Kaigaku was unable to learn the first and most fundamental form of Thunder Breathing, **Thunderclap and Flash**, despite being able to learn and master all other 5 techniques of this Breathing Style. Still, some Demon Slayers said that because of Kaigaku's inability to master the first form, the other 5 techniques he learnt wouldn't amount to much.

After becoming a demon and developing a Blood Demon Art, Kaigaku's Thunder Breathing has manifested into reality as he can manipulate actual lightning and electricity, greatly improving the offensive power of this Breathing Style. Kaigaku even stated that he has "surpassed Thunder Breathing".

### Blood Demon Art

**Electrokinesis:** Complementing his Breathing Style: Thunder Breathing, Kaigaku's Blood Demon Art grants him special electrokinetic abilities which allow him to generate and manipulate black colored lightning and electricity from his flesh and blood. This lightning-like Blood Demon Art creates a special effect which cracks and rends his target's flesh while burning it, greatly augmenting the lethality and offensive capability of his attacks. The bleeding caused by Kaigaku's sword effect nearly destroyed Zenitsu's eyeballs and left him severely injured after the fight.

Kaigaku uses this Blood Demon Art to great effect, utilizing lightning in conjunction with his Thunder Breathing techniques to enhance his attack range and speed, which even Zenitsu had trouble keeping up with. It is implied that this Blood Demon Art helped make up for Kaigaku's own inability to perform the most fundamental technique of the Thunder Breathing style, **Thunderclap and Flash**, possibly making him the most powerful user of Thunder Breathing as he had already mastered the other 5 standard forms in the Breathing Style.

### Techniques

* **Second Form: Rice Spirit** (弐 (に) ノ型 (かた)  稲 (いな) 魂 (だま) , *Ni no kata: Inadama*?) - The user releases five arched slashes accompanied by lightning in quick succession.

* **Third Form: Thunder Swarm** (参 (さん) ノ型 (かた)  聚 (しゅう) 蚊 (ぶん) 成 (せい) 雷 (らい) , *San no kata: Shūbun Seirai*?) - The user surrounds the enemy with waves of arched lightning and attacks them from all directions.

* **Fourth Form: Distant Thunder** (肆 (し) ノ型 (かた)  遠 (えん) 雷 (らい) , *Shi no kata: Enrai*?) - The user generates a ball of electricity that releases waves of strong multi-directional lightning bolts from afar.

* **Fifth Form: Heat Lightning** (伍 (ご) ノ型 (かた)  熱 (ねつ) 界 (かい) 雷 (らい) , *Go no kata: Netsu Kairai*?) - The user unleashes a long-ranged upward sword slash accompanied by lightning.

* **Sixth Form: Rumble and Flash** (陸 (ろく) ノ型 (かた)  電 (でん) 轟 (ごう) 雷 (らい) 轟 (ごう) , *Roku no kata: Dengō Raigō*?) - The user releases a series of powerful long-ranged lightning attacks that strike his opponent from afar.

## Equipment

**Flesh Katana:** Like his brethren, Kokushibō, Kaigaku carries around a modified version of a standard Nichirin katana he used when he was a Demon Slayer that is made from his flesh and blood. However, unlike Kokushibō's katana, his katana isn't heavily distorted and is nearly identical to his original one. His flesh katana has a black lightning pattern on both sides of his yellow tinted blade along with a black and gold handle. Kaigaku's katana has a handguard identical to the one used by Zenitsu, which is circular shaped with 4 slight indentations, the center has a silver tone with small triangles and has a golden border. It is implied that his flesh blade facilitates the use of his Blood Demon Art, as he can supposedly channel his blood through it when he unleashes his techniques. Unlike most swordsmen, Kaigaku places his sword sheath on his back instead of by his waist.

## Battles

Kaigaku Battles

**Infinity Castle Arc**

* Zenitsu Agatsuma vs Kaigaku

## Trivia

* His given name, Kaigaku, is composed of the kan-on'yomi reading of the kanji for both "sly, cunning, crafty" (獪 (かい) , *kai*?) and "tall mountain, mountain peak" (岳 (がく) , *gaku*?).
	+ His surname in the Kimetsu Academy, **Inadama**, is composed of the kun'yomi reading for "the rice plant oryza sativa" (稲 (いな) , *ina*?) along with the rendaku for "gem, jewel" (玉 (だま) , *dama*?).
* Because of the movement pattern of the Thunder Breathing's first form, it can be speculated that one reason he had difficulty mastering it was because he placed his scabbard/sheath on his back instead of either of his waists.
* Kaigaku is the second known Demon Slayer to have become a demon, the first being Kokushibō.
* Kaigaku's necklace and bracelets are taijitu/magatama (tomoe) symbols. Before he transforms into a demon, the symbol is yellow (good, enlightened), and it turns blue (bad, darkness, depth) after he becomes one. The fractured magatama itself seems to represent his broken and unstable mentality.
* Kaigaku ranked 21st place in 2nd character popularity poll with 865 votes.
* Kaigaku received a kimono from Jigorō, his sensei, identical to the one he himself wore, but Kaigaku never wore it once.

## Quotes

* (To Zenitsu Agatsuma) "*"Gramps"? Don't speak of him in that familiar way! Sensei is a former Hashira! Someone who earned the highest rank in the Demon Slayer Corps! It's a rare chance to receive instruction from a former Hashira! The time Sensei spends training you is all for nothing! You're an eyesore! Get lost! Why are you here? Why do you insist on clinging here?*"
* (To Zenitsu Agatsuma about Jigorō Kuwajima) "*I don't care! So what? Are you saying I should be sad? That I should repent? I don't care about anyone who doesn't value me! At every moment I always serve those who know my value!*"
* "*There is no shame in kneeling before someone in overwhelming strength. As long as you stay alive, it will work out somehow. Until you die, you haven't lost. You may rub your face in the dirt... you may lose your home or drink muddy water... people may curse you for stealing money... but as long as you live on... you can win someday. You will win. I have moved forward with that belief.*"
* (To Zenitsu Agatsuma about good and evil) "*Those who correctly evaluate me and know my value are good! Those who have a low estimation of me are evil!*"