Kaigaku

## Introduction

Kaigaku 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 Gyutaro after their deaths.
He was a former Demon Slayer and Zenitsu Agatsuma's senior disciple under the former Thunder Hashira (鳴なり柱ばしら Nari Bashira?), Jigoro Kuwajima. However, sometime during the Hashira Training Arc, Kaigaku encountered and lost to Upper Rank One, Kokushibo, and surrendered to him to save his own skin, thus becoming a demon and later a member of the Twelve Kizuki.

### Character Details

As the one who was initially supposed to inherit Jigoro'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.

## Powers and Stats

Tier: At least **8-D**, easily up to **8-C**

**Name**: Kaigaku

**Series**: Kimetsu no Yaiba

**Age**: Likely 16

**Classification**: Demon, Thunder Breathing User

**Powers and Abilities**: Superhuman Physical Characteristics, Acrobatics, Enhanced Senses (Demons can easily smell blood and poison being able to differentiate more or less nutritious blood types. Has excellent perception and awareness.) Extrasensory Perception (Demons are capable of sensing when someone of proper kill value is near and differentiate them.) Immortality (Types 1, 2, 3, and 6) Regeneration (Mid-High; Demons can regenerate from their heads and other body parts being crushed.) Self-Sustenance ( Type 3; Demons do not sleep) Body-Control (A low-Level demon could grow hands from parts of its body after being detached.) Skilled Hand-to-Hand Combatant (Even low level demons can fight on par with Demon corpse members causing disparity.) Information Analysis (Demons can quickly analyze and perceive details from blood such as sickness and gene combination.) Overwhelming Aura, Fear Manipulation, Paralysis Inducement (Demons can induce massive fear into people causing them to feel heavy and potentially harm them.), Electricity Manipulation (With lightning breathing)

**Attack Potency**: **Small Building Level** (As an Upper Moon, Kaigaku should easily be above Tanjiro, who could split boulders), **Higher** with thunder breathing, **High-Rise Level** (Can harm people like Zenitsu, who could damage and fight on par with Lower Moons) possibly **City Block Level** (Would still be on par with a weakened Zenitsu, who was being compared to people like Inosuke Hashibira and Kanao Tsuyuri)

**Speed**: Atleast **Supersonic** (Comparable to Zenitsu, who can blitz him during the beginning of the fight), Likely **Hypersonic** (Should be somewhat comparable to the former Upper Moon 6, who could keep up with Tengen, who could move faster than what Tanjiro, Zenitsu and Inosuke could perceive at the time) likley **Higher** with Thunder Breathing

**Durability**: **Small Building Level** (As an Upper Moon, Kaigaku should easily be above Tanjiro, who could split boulders), **Higher** with thunder breathing, **High-Rise Level** (Can harm people like Zenitsu, who could damage and fight on par with Lower Moons) possibly **City Block Level** (Would still be on par with a weakened Zenitsu, who was being compared to people like Inosuke Hashibira and Kanao Tsuyuri)

**Stamina**: **Infinite** (Demons don't tire)

**Intelligence:** **Average**

**Notable Attacks and Techniques:**
**Breath of Thunder:** Taught to Kaigaku by a former Pillar, Jigoro Kuwajima. But, he was unable to learn the first style despite learning the other styles of the Thunder Breathing. Like Kokushibo, a former Demon Slayer, he combines his Blood Demon Art Technique with his Breathing Style to increase its power.

* **Second Form: Rice Spirit:** The swordsman is able to generate five straight attacks around the user in a single moment.
* **Third Form: Thunder Swarm:** Generates a spinning wave of lightning in all directions.
* **Fourth Form: Distant Thunder:** The user releases multiple ranged strikes towards a target.
* **Fifth Form: Heat Lightning:** A single, focused, slashing attack.
* **Sixth Form: Rumble and Flash:** A series of strong ranged attacks released around the user.