Senjuro Rengoku

## Portrayal

**Senjuro Rengoku** is a minor supporting character in the original Demon Slayer, also returning in Demon Slayer: Blade of the Night, having spent the 25 year timeskip training, and eventually becoming the Magma Pillar. He is the younger brother of Kyojuro Rengoku.

## **Appearance:**

Senjuro is a tall man with a fair complexion, and bright orange hair with red tips. He keeps it styled with a fringe, almost reaching to his eyes, and it is split nearly at the center. Senjuro has his hair long, reaching about to his shoulder. His eyes are slanted, and are always half-open.

Senjuro wears a traditional Pillar Uniform, with a black haori, which, despite having a plain top, reaches its end on a dark red flame pattern, not unlike the Rengoku Family cape.

## **Personality:**

Senjuro is a timid, coy man with a gentle heart, but a small presence, regardless of his Rengoku Family. He almost never speaks up, and usually reserves himself to silence, only speaking when spoken to, and he usually keeps a very professional exterior regardless.

Senjuro, originally was set to never become a slayer due to his lack of affinity to the Flame Breathing, but with Muzan's survival, and Kyojuro's grievous injuries, alongside Shinjuro's strengthened abuse, Senjuro picked up training once again, and with a painstaking amount of effort, the Magma Breathing was developed, and he became a Slayer, ascending the ranks relatively fast.

Senjuro hasn't made many appearances, being only mentioned sparingly and having little presence in meetings. It can be inferred by his Breathing Style, however, that he was willing to sacrifice his very body to grow stronger, to prove that he wasn't a failure, that he could overcome the Sun Breathing that his father so deeply hated.

## **Synopsis:**

Senjuro is the younger brother of Kyojuro Rengoku, and at one point, he was set to become his brother's successor. His case was odd, as he didn't have affinity to the Flame Breathing at all, and due to this, he resigned from the future position. However, during the timeskip, Senjuro continued to train, until he developed the Magma Breathing, and grew strong his own way.

## **Abilities:**

**Monumental Strength:** Senjuro, as a Pillar, can be inferred to be extremely physically powerful.

**Monumental Speed:** Senjuro is a Pillar, therefore, he is immensely fast.

**Indomitable Will:** Senjuro, through a painful and extensive amount of training, managed to develop the Magma Breathing with the sole purpose of becoming strong to be able to fight alongside his brother.

**Total Concentration Breathing:** Senjuro has achieved Total Concentration Breathing, allowing him to grow beyond the realm of a normal human

**Demon Slayer Mark:** Senjuro has unlocked his Demon Slayer Mark, as he is a Pillar. Its appearance is unknown.

## **Fighting Style:**

**Master Swordsman:** Senjuro, through extensive training, managed to reach a realm of swordsmanship limited to the very top of the Demon Slayer Core, becoming one of the strongest humans alive.

### **Breathing Style:**

**Flame Breathing** *(Hono no Kokyu)*: Senjuro's original Breathing Style, he was instructed on the Flame Breathing by his father, but had no talent with it whatsoever, going against what was to be expected of a Rengoku Family member.

**Magma Breathing** *(Yogan no Kokyu)*: Senjuro's own creation, the Magma Breathing is a Style primarily focused on extremely powerful, but also stiff techniques that leave an intense toll on the user's body.

#### **Techniques:**

* **First Form: Flowing Fiery Slash** *(Ichi no Kata: Nagareru Giri)* - The user generates enough momentum to do one concentrated slash, dashing in the same direction of the strike

* **Second Form: Circular Eruption** *(Ni no Kata: Tahoko no Funka)* - The user performs a single, powerful slash around their entire body. This Form can be adapted to be used in any direction

* **Third Form: Rain of Fire** *(San no Kata: Hi no Ame)* - The user swings their blade and body in a swirling motion until they reach the target, upon which, they will dash upwards, pointing their blade downwards and attacking with their whole weight.

* **Fourth Form: Melting of Steel** *(Shi no Kata: Hagane no Yokai)* - The user will slash in multiple directions defensively, breaking any sort of possible contact.

* **Fifth Form: Solid Obsidian** *(Go no Kata: Kotai Kokuyoseki)* - The user will flow along their target’s defences, dodging barriers and counters to strike from an off-angle

* **Sixth Form: Fading Embers** *(Roku no Kata: Iroaseta Nokoribi)* - The user will attack in increasingly weak motions, and once the opponent gives an opening, they will strike full force.

* **Seventh Form: Purgatory** *(Shichi no Kata: Rengoku)* - The user will charge full force, and will adapt to any changes in the opponent’s body. This attack is devastating to both user and opponent.

## **Equipment:**

**Standard Nichirin Sword:** Senjuro carries around a regular Nichirin Katana, which is colored dark red, with multiple cracks along its surface, as expected from a Magma Breathing user. Its handguard is a plain black circle with a silver border, which by now does not reflect anything.

## **Familiars:**

**Saisei:** Senjuro's crow Saisei is often very melancholic. It is also very dramatic.

## **Battles:**

Senjuro has no on-screen battles as of yet.

## **Trivia:**

* Senjuro's name can be read as [Sen], meaning "Thousand", [Ju], meaning "Longevity", and [Ro], meaning "Son", while his surname [Rengoku], means "Purgatory"
* Senjuro's openness is about 10%
* Senjuro's opinions on his fellow Pillars are: