Kimetsu no Yaiba Wiki
Kimetsu no Yaiba Wiki


My brother didn't have a Tsuguko, a successor. I was supposed to be his Tsuguko. As his backup, I had to build experience. But... my Nichirin Sword never changed color. If you don't reach a certain level of swordsmanship... the color doesn't change. No matter how hard I trained... I was no good. So I'm giving up... being a swordsman. I'll be useful in some other way. This severs the succesion of Flame Hashira. A blotch on their long history. But I'm sure... my brother would forgive me.
 

Senjuro Rengoku ( (れん) (ごく) (せん) 寿 (じゅ) (ろう) Rengoku Senjurō?) is a supporting character of Demon Slayer: Kimetsu no Yaiba. He is the younger brother of the former Flame Hashira, Kyojuro Rengoku and the son of Shinjuro Rengoku and Ruka Rengoku.

Appearance[]

Senjuro has a similar appearance to his brother, Kyojuro Rengoku, and father, Shinjuro Rengoku, possessing unruly golden hair that flares out around his face, becoming red near the ends above his ears and shoulders, that he wears messily tied back behind his head. He has fair skin and large, gold eyes that redden near the pupils, that are slanted inwards and shaped so as to give him a determined yet kind appearance.

Senjuro wears a plain white yukata and juban with darker umanori-styled hakama pants. In Kyojuro Rengoku's memory dream in the Mugen Train, he wore a dark haori above his white yukata.

Personality[]

Senjuro is originally seen to be very sad and rattled by his brother's death and his father's verbal abuse, but, after spending some time talking to Tanjiro Kamado, his true personality as a kind, caring individual who can usually see the best in a situation or person shines through. He has hope for his future, and even though he knows that by not becoming a Demon Slayer he has broken his family's ancient tradition, he knows that his older brother, Kyojuro, would forgive him for leaving such a scar on their history.[2]

History[]

Rengoku family Shirogane

Senjuro's birth.

It's noted that, at some point in his life, Senjuro was to become Kyojuro's successor and so had been training to become a Demon Slayer. However, due to his lack of skill in the field, Senjuro had to give up on that dream and decided to spend his life helping people in other ways.[3]

Synopsis[]

Mugen Train Arc[]

Senjuro first appears in Kyojuro's dream, asking if their father was happy to hear the news of Kyojuro's inauguration as the Flame Hashira. He is met with a different response and is saddened to hear the hopelessness of their father's mental situation. Kyojuro later gives him words of encouragement and reassures him that things were not as bad as they seemed and to do his best throughout life.

Senjuro appears once again after the battle with Enmu, Lower One of the Twelve Kizuki, and Akaza, Upper Rank Three. He is seen sweeping the entrance outside of his home, wearing a saddened expression, as a worn out and injured Tanjiro arrives at his house in the hope of delivering Kyojuro's final message to his family. Tanjiro calls out to Senjuro and explains why he is there, but Senjuro just looks at him, confused, saying he already knew what had happened to his brother and asking the Demon Slayer if he is alright.[4]

Senjuro crying at his father's words

Senjuro cries at his father's words.

Suddenly, Senjuro's father, Shinjuro, appears from his house, yelling that what Tanjiro's come to tell them is useless, while belittling and cursing Kyojuro for becoming a Demon Slayer since he always knew it would just get him killed.[5] Tanjiro and Senjuro are shocked by his words, but remain silent as he continues to rant about how people's powers are already decided for them at birth, but Kyojuro still went and became a Demon Slayer despite the fact that he had none. At the sound of these sharp words, tears begin to form in Senjuro's eyes, but, instead of stopping and comforting his son, Shinjuro tells him to stop making that pitiful expression since the funeral was already over.

Angered by this display of cruelty, Tanjiro asks Shinjuro to stop talking to and about his sons in that way, which only causes the latter to turn his attention to him and yell at him to get off his property, and, bravely, Tanjiro says that he is a Demon Slayer. The container Shinjuro is holding smashes to the ground as he considers what this could mean, and, jumping to the first conclusion that comes into his mind, he angrily asks Tanjiro if he is a Sun Breathing user. Without waiting for an answer, Shinjuro swiftly attacks Tanjiro and pins him to the ground, forcefully slapping Senjuro away when he tries to pull his father off the injured Demon Slayer.

While Shinjuro is distracted by his son, Tanjiro swiftly delivers a blow to his face, forcing him off of him, and, as Tanjiro's patience has finally worn thin, furiously asking him what the hell he's been doing, badmouthing Kyojuro, who gave up his life, and then hitting the only son he has left. Shinjuro shouts that he knows Tanjiro is just mocking him because he's a Sun Breathing user who's just full of himself because he can use the original Breathing Style, and Tanjiro shouts back that he can never get full of himself because of how badly he's just been beaten down. Running at Shinjuro, the young Demon Slayer tells him never to criticize Kyojuro again.[6]

Shinjuro strikes Senjuro

Shinjuro strikes his son.

Senjuro tries to warn him that Shinjuro is a former Hashira, but, because he's being driven by so much anger and sorrow, Tanjiro continues to charge at him. Shinjuro hits Tanjiro's face, ignoring the yells of protest from his son, and begins to repeatedly land blows on Tanjiro's body until the young Demon Slayer hits him square in the jaw with a spiralling headbutt, causing them both to fall down on top of each other.[7]

Sometime later, inside the Rengoku estate, Senjuro brings Tanjiro some tea, as Tanjiro thanks him for his kindness. He also apologizes for knocking Shinjuro out with his headbutt and asks if he's alright, to which Senjuro replies that he thinks he'll be fine. Senjuro says that he feels relieved, as Tanjiro was able to stand up to his father as he insulted Kyojuro when Senjuro couldn't say a word. He wonders aloud how his brother's last moments played out, and Tanjiro explains that he went out gloriously. Tanjiro apologizes again to him for not being of any help to his brother, but Senjuro tells him not to worry about it, and that that response would've been what Kyojuro would say.[8]

Senjuro then goes off to look for the book Tanjiro requested to have a look at, and returns with a book entitled "The Generational Flame Hashira Record," which Tanjiro takes from him, thanking him.[9] They sit down to open the book, but only discover that it's been torn to shreds. Tanjiro asks Senjuro if it's always been in this condition to which the latter replies that it definitely hasn't because it was supposed to have been preserved very well. He guesses that it was his father who tore it apart, and apologizes to Tanjiro, who tells him not to worry since it wasn't his fault.

The Generational Flame Hashira Record - Anime

Tanjiro and Senjuro find out that Shinjuro had ripped the book.

Senjuro feels bad that he came all this way only to discover that the book he'd wanted had been ruined, but Tanjiro once again tells him that it's fine since he can always try and discover more about the technique through training himself rather than reading. He explains that his body becomes a lot less mobile when he uses his fully-focused breathing, so he needs to increase his stamina in order for him to perfect the technique. Because of the regret he feels due to his inability to save Kyojuro, Tanjiro says that he will keep moving forward and strive to become a great Hashira one day, just like Kyojuro had been.

Senjuro is touched by this, and tears up, smiling to himself. He tells Tanjiro that his brother never had a successor, and that he didn't fill the role because he was too weak for his Nichirin Sword to even change color. However, he explains, he can still do other things that are useful to people, and, even though he knows breaking the succession of Flame Hashira, he knows Kyojuro would forgive him. Tanjiro encourages him, telling him to go down the path he thinks is right and saying that he will headbutt anyone who badmouths him, to which Senjuro replies that it would probably be best if he stopped doing that.[10]

Senjuro giving Tanjiro his brother's sword guard

Senjuro giving Tanjiro his brother's sword guard.

As Tanjiro prepares to leave, Senjuro says that he will try and restore the Flame Hashira book for him by using other sources and asking his father about its contents, saying that if he figures anything out he'll send a crow over to Tanjiro right away. He thanks Tanjiro for their talk, and offers him the gift of his brother's Nichirin Sword guard, which, after some convincing, Tanjiro accepts. With that, he wishes the young Demon Slayer well and waves him goodbye.[11]

Senjuro turns and heads back into his house, finding his father sitting alone and attempting to talk to him about what had happened earlier, but Shinjuro just tells him to be quiet and leave him alone. With no other choice, Senjuro exits Shinjuro's room, only leaving the message that was left for him: "Please take care of yourself."[12]

Infinity Castle Arc[]

Senjuro wrote a letter to Tanjiro regarding a hidden thirteenth form of his Sun Breathing, but as he was in the midst of a battle with Upper Rank Three, Tanjiro was forced to fight the demon and survive to read it. A Kasugai crow (possibly his or Tanjiro's) sat nearby the battlefield until Akaza's eventual death, allowing Tanjiro, after regaining consciousness from his ordeal, to read Senjuro's letter.

In addition. when Akaza stated that he was glad that Kyojuro had died, Tanjiro thought about Senjuro and Shinjuro, enraged at the demon's insult.

Sunrise Countdown Arc[]

Following the defeat and death of Muzan Kibutsuji, as well as Tanjiro reverting back to his humanity after temporarily being turned into a demon by Muzan, Senjuro visited his Demon Slayer friend while he was recovering from his grievous injuries. He was accompanied by his father, who was much more happy and calm than he was before, a far cry from the abusive curmudgeon he had been when Tanjiro first met the father and son.

Legacy[]

It is presumed that at some point, Senjuro married and had children, as his bloodline would continue into the present day with his direct descendant, Tojuro Rengoku, who behaved very similarly to Senjuro's late elder brother.

Abilities[]

Despite coming from a long line of generational Flame Hashira, Senjuro never possessed any great skill as a Demon Slayer. As hard as he tried, he couldn't acquire the degree of swordsmanship needed to make his Nichirin Sword change color, and eventually gave up on following in his brother's footsteps.[3]

Relationships[]

Shinjuro Rengoku[]

Senjuro's relationship with his father was presumably close until his period of alcoholism and self-loathing. During Tanjiro's visit to the Rengoku Estate, Senjuro greatly feared Shinjuro's violent outburst and could not defend Kyojuro when the latter insulted him over his death. Afterwards, after Senjuro tells him Kyojuro's last message, Shinjuro would reflect and greatly regret his past treatment of his sons.

Kyojuro Rengoku[]

Senjuro collapsing as he learns about the death of his brother

Senjuro hearing about Kyojuro's death.

Senjuro is Kyojuro's younger brother. Senjuro admires his older brother greatly, to the point where he himself tried to learn how to utilize Flame Breathing. When he realized that he could never attain the level of the previous Flame Hashiras, he believed that Kyojuro would be disappointed, but was shocked when his brother still continued to be proud of him. When he received the message that Kyojuro was killed, Senjuro dropped to his knees in tears upon hearing it. Even during Tanjiro's visit several days after his death, Senjuro continued to mourn his beloved brother's demise.

Mitsuri Kanroji[]

Due to her training under his older brother, it was shown that Mitsuri was decently close with Senjuro as well. For his own part Senjuro seemed fond of her, making her sweets, and hugging both her and Kyojuro in elation upon their return from defeating a member of the Twelve Kizuki.

Tanjiro Kamado[]

Despite only meeting Tanjiro for a short period of time, Senjuro's friendship with him seemed naturally quite close, due to the kindness that Senjuro showed to the Demon Slayer after he defended his older brother Kyojuro from his father's curses. Senjuro even thanked Tanjiro for his bravery towards his hostile father, and openly admitted that he himself was too scared to stand up to Shinjuro. Senjuro was also quick to reassure Tanjiro that both he and Kyojuro knew it wasn't his fault that the late Flame Hashira had died, and encouraged Tanjiro to believe that he did the best he could have done in the situation.

Relatives[]

Shinjuro
   
   
Ruka
   
   
   
   
   
   
   
   
   
   
   
   
   
   
Kyojuro
   
   
Senjuro
   
   
   
   
   
   
   
   
   
   
Tojuro

*The story does not indicate which child of Senjuro carries on the lineage nor the quantity of generations that follow prior to Tojuro.

Trivia[]

  • Senjuro's first name contains the Go-on'yomi kanji for "thousand" ( (せん) sen?), "longevity" (寿 (じゅ) ju?) and "son" ( (ろう) ?).
  • Senjuro exchanges letters with Tanjiro.[13]
  • Senjuro loves reading Tanjiro's stories about Zenitsu and Inosuke. For him, they are so entertaining that he can't stop laughing.[13]
  • In the Kimetsu Academy, Senjuro is a first-year student in middle school, averaging in everything. He is good friends with Rui Ayaki.
  • Senjuro shares his Japanese and English voice actors with Sol Servolt from the video game Summon Night 6: Lost Borders.

Quotes[]

  • (To Tanjiro Kamado) "My brother didn't have a Tsuguko, a successor. I was supposed to be his Tsuguko. As his backup, I had to build experience. But... my Nichirin Sword never changed color. If you don't reach a certain level of swordsmanship... the color doesn't change. No matter how hard I trained... I was no good. So I'm giving up... being a swordsman. I'll be useful in some other way. This severs the succesion of Flame Hashira. A blotch on their long history. But I'm sure... my brother would forgive me."[14]
  • (Senjuro praying) "Kyojuro... A large fight has begun. And father has gone to be with master. Please, protect father and Tanjiro. The letter I wrote was delivered to Tanjiro right? It's a trivial thing but the writings in the book of the Flame Hashira... may be helpful. It's a conversation between the Flame Hashira at that time and a swordsman of Sun Breathing. I wrote in the letter what the swordsman who wields Sun Breathing, the most basic technique... said about the time he confronted Muzan. The Flame Hashira, who was my ancestor, lost confidence. ...But Tanjiro won't lose. He will open a path into the future. Isn't that right... Kyojuro?" [15]

References[]

  1. Kimetsu no Yaiba: One-Winged Butterfly, (Chapter 5.)
  2. Kimetsu no Yaiba Manga: Chapter 69 (Page 8).
  3. 3.0 3.1 Kimetsu no Yaiba Manga: Chapter 69 (Pages 7-8).
  4. Kimetsu no Yaiba Manga: Chapter 67 (Pages 17-19).
  5. Kimetsu no Yaiba Manga: Chapter 67 (Page 20).
  6. Kimetsu no Yaiba Manga: Chapter 68 (Pages 1-12).
  7. Kimetsu no Yaiba Manga: Chapter 68 (Pages 13-15).
  8. Kimetsu no Yaiba Manga: Chapter 68 (Pages 16-19).
  9. Kimetsu no Yaiba Manga: Chapter 68 (Page 20).
  10. Kimetsu no Yaiba Manga: Chapter 69 (Pages 1-9).
  11. Kimetsu no Yaiba Manga: Chapter 69 (Pages 10-11).
  12. Kimetsu no Yaiba Manga: Chapter 69 (Pages 12-14).
  13. 13.0 13.1 Kimetsu no Yaiba Manga: Volume 10, (Extra Pages).
  14. Kimetsu no Yaiba Manga: Chapter 69 (Page 6-8).
  15. Kimetsu no Yaiba Manga: Chapter 149 (Page 13-14).


Navigation[]

[v · e · ?]
Demon Slayer Corps
Ubuyashiki Family: Kagaya Ubuyashiki · Amane Ubuyashiki · Hinaki Ubuyashiki · Nichika Ubuyashiki · Kiriya Ubuyashiki · Kuina Ubuyashiki · Kanata Ubuyashiki · Senri Ubuyashiki · Akito Ubuyashiki
Hashira: Giyu Tomioka · Mitsuri Kanroji · Obanai Iguro · Sanemi Shinazugawa · Gyomei Himejima · Kyojuro Rengoku · Tengen Uzui · Muichiro Tokito · Shinobu Kocho · Kanae Kocho · Sakonji Urokodaki · Jigoro Kuwajima · Shinjuro Rengoku
Demon Slayers: Tanjiro Kamado · Zenitsu Agatsuma · Inosuke Hashibira · Genya Shinazugawa · Kanao Tsuyuri · Murata · Ozaki · Masachika Kumeno · Yoriichi Tsugikuni · Takeuchi · Nagakura · Noguchi · Yoshioka · Shimamoto
Butterfly Mansion: Aoi Kanzaki · Sumi Nakahara · Kiyo Terauchi · Naho Takada · Goto
Swordsmith Village: Tecchin Tecchikawahara · Hotaru Haganezuka · Kozo Kanamori · Kotetsu · Tetsumotonaka · Tetsudoji · Tetsutani · Tetsuido
Other/Associates: Sabito · Makomo · Suma · Makio · Hinatsuru · Masao Maeda
Demons
Demons: Muzan Kibutsuji · Nezuko Kamado · Temple Demon · Hand Demon · Swamp Demon · Asakusa Demon · Tamayo · Yushiro · Susamaru · Yahaba · Tongue Demon · Horned Demon · Spider Demon (Father) · Spider Demon (Mother) · Spider Demon (Son) · Spider Demon (Daughter) · Shizu Shinazugawa · Woodland Demon · Serpent Demon
Twelve Kizuki: Kokushibo · Doma · Akaza · Nakime · Hantengu · Gyokko · Gyutaro · Daki · Kaigaku · Enmu · Rokuro · Wakuraba · Mukago · Rui · Kamanue · Kyogai
Civilians/Other
Kamado Family: Tanjuro Kamado · Kie Kamado · Takeo Kamado · Hanako Kamado · Shigeru Kamado · Rokuta Kamado · Sumiyoshi Kamado · Suyako Kamado · Sumire Kamado
Shinazugawa Family: Kyogo Shinazugawa · Sumi Shinazugawa · Teiko Shinazugawa · Hiroshi Shinazugawa · Koto Shinazugawa · Shuya Shinazugawa
Northwest Town: Kazumi · Satoko · Tokie
Tsuzumi Mansion: Teruko · Shoichi · Kiyoshi
Entertainment District: Koinatsu · Omitsu · Toyo · Rei · Yatsu
Other: Saburo · Hisa · Senjuro Rengoku · Ruka Rengoku · Yuichiro Tokito · Tsutako Tomioka · Sayo · Keizo · Koyuki · Kotoha Hashibira · Akeno Tsugikuni · Uta · Takaharu
Animals: Chachamaru · Kaburamaru
Species/Groups: Kasugai Crows · Ninju
Descendants/Reincarnations
Kamado Family: Kanata Kamado · Sumihiko Kamado
Agatsuma Family: Toko Agatsuma · Yoshiteru Agatsuma
Other: Aoba Hashibira · Tojuro Rengoku · Tenma Uzui · Giichi Tomioka · Sanehiro Shinazugawa
Spin-Off/Anime Original Characters
Demon Slayers: Uraga
Civilians: Yae · Taro · Fuku · Tomi · Tatsu
Demons: Matazo · Hairo · Flute Demon · Ubume · Slasher · Mantis Demon