Are Muichiro, Kokushibou & Tanjiro Somehow Related?

Are Muichiro, Kokushibou & Tanjiro Somehow Related?

The family trees of Demon Slayer characters are somewhat complex and intricate. And while those who’ve read the manga have it easier as they’re able to connect all the dots, those who’ve just seen the anime series might have some trouble grasping who is related to whom in this great anime series. Now, to help you out, we’re going to explain the relationships between three of the characters from the series, by telling you whether Muichiro, Kokushibou, and Tanjro are somehow related.

Tanjiro Kamado is not related to Muichiro and Kokushibou. The Kamado family are descendants of Sumiyoshi, one of Yoriichi’s closest friends, but since Sumiyoshi and Yoriichi aren’t related, neither are Tanjiro and Kokoshibou. On the other hand, Muichiro is a direct descendant of Kokushibou. As for Tanjiro and Muichiro, they’re just friends.

The rest of this article is going to further elaborate on the relationships between these three characters. You’re going to get information on each of the relationships, how they’re exactly related and what the true nature of their relationships is, based on each of the possible pairings.

Are Muichiro and Tanjiro Related?

During their first meetings, Tanjiro and Muichiro had a strained relationship. Muichiro reprimanded Tanjiro by hitting him in the head with a rock after he interrupted Kagaya Ubuyashiki’s speech, and Tanjiro was confused by Muichiro’s rude treatment of Kotetsu in the Swordsmiths’ Village. However, after listening to Tanjiro’s advice to help others, Muichiro changed his attitude and saved Kotetsu and Kozo Kanamori during Gyokko’s attack on the village.

After regaining his memory, Muichiro and Tanjiro became good friends, with Muichiro being very biased towards Tanjiro when they trained together during Hashira training. After learning of Muichiro’s death at the hands of Kokushibo, Tanjiro shed tears over the loss of his friend and vowed to continue fighting hard.

In order to completely understand how and why this relationship functioned the way it did, we have to explain Muichiro’s personality a bit. Muichiro is an air-headed individual who seems to constantly wander off in his thoughts and never focus on one thing.

Impassive and sometimes obtuse, he tends to think only for himself and operates only on logic, never letting emotion guide him. Despite this, he has been shown to go serious when needed and is dedicated to his post as Pillar of the Mist.


However, before his twin brother died when the siblings were eleven, Muichiro’s personality was that of a much more caring individual. Having initially taken after his father, he was shown to exhibit a higher level of kindness and understanding than his demon slaying behavior, believing that he should aim to do good to others if he did. wanted good to be done for him.

After his brother was killed by a demon, Muichiro subsequently lost his memory and held a pervasive rage deeply repressed within him that inevitably drove his future, intense training.

After this memory loss, he started to show the indifferent attitude he carries in Hashira. After his memories returned, Muichiro began to express more emotions and became more confident in himself, helping him to form friendships between the demon slayers. He also learned other expressions, such as sarcasm and smugness towards the top 5 rank, Gyokko.

Are Muichiro and Kokushibou Related?

Muichiro is the descendant of Kokushibo, a former Sengoku-era demon slayer who later ascended to Upper Rank One. Kokushibo is a major antagonist of Demon Slayer: Kimetsu no Yaiba. He is a demon affiliated with the Twelve Demonic Moons, occupying the highest position, the Upper First Moon.

Almost five centuries ago in the Sengoku era, Kokushibo was a human named Michikatsu Tsugikuni, a former demon slayer and the older twin brother of Yoriichi Tsugikuni.

Kokushibo was often very reserved as a demon, and with so little knowledge about the higher ranks, not much was originally known about him. He was an adamant rule-maker, punctual, and he showed great respect for the Twelve Moons hierarchy – as seen in the meeting of the upper ranks. Kokushibo has also been portrayed as being humble, and he hasn’t been shy about admitting failure or complaining about any difficulty.

He displayed a strong sense of loyalty to Muzan Kibutsuji, with most of his actions done for the sole purpose of achieving Muzan’s goals. Despite his outward reserve and humility, he was also rather cold; his words could be extremely harsh, especially when berating individuals. His threats were simply cruel and extremely serious, and he demanded absolute obedience.


Kokushibo was also very elated when the opponents he faced challenged him; like helping dress Muichiro Tokito’s amputated hand on his swordsmanship skill, praising Gyomei Himejima for his unmatched human abilities, and sparing Akaza because he enjoyed the challenge of fighting him.

However, because of this, he also felt irritation after realizing that he was dead and he took pity on Gyomei for his impending death after unlocking his Demon Slayer Marks.

He had a complex relationship with his human past. He showed something warm towards his descendant, Muichiro, praising his skill and determination, and decided to convert Muichiro into a demon to spare his life. At the same time, he referred to Muichiro and his abilities as the natural result of the transmission of his “cells”.

In his duel with Gyomei, the demon’s jokes suggested a fear of death. When Gyomei’s Marks appeared, Kokushibo preemptively lamented the loss of a talented fighter and urged him to become a demon to continue honing his skills. He seemed surprised when Gyomei vehemently rejected his offer and called his mentality pathetic.

It was revealed that as a human, Kokushibo harbored an immense sense of envy towards his younger twin brother, Yoriichi Tsugikuni, for his natural talent and incredible abilities.

These feelings of jealousy and contempt grew stronger when he saw his brother grow into an old man despite Yoriichi awakening his demon slayer mark, which was supposed to doom him to die at the age of 25.

However, despite this immense jealousy, spite and outright hatred he harbored for Yoriichi, he still loved his brother deeply, as seen when he was touched by Yoriichi cherishing the handmade flute he had made for him when he was a child. Now that we’ve introduced Kokushibou to you, we can continue further with his relation to Muichiro.


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Kokushibo is also the ancestor of Muichiro Tokito and Yuichiro Tokito and the one who transformed the elder of Zenitsu Agatsuma, Kaigaku into a demon and joined the Twelve Demonic Moons.

When he first encounters his ancestor in the Castle of Infinity, Muichiro is enveloped by an intense fear of the demon’s overwhelming presence that is completely new to him. Kokushibo feels a sense of familiarity with Muichiro and later confirms that he is his descendant.

When he tells Muichiro of their kinship, Misty Hashira is shocked and refuses to believe him, instead managing to calm down immediately, impressing the demon. Muichiro’s abilities at his young age exceed Kokushibo’s expectations to the point where he suggests Muzan Kibutsuji turn him into a demon.

Are Tanjiro and Kokushibou Related?

There is no direct relationship between Kokushibou and Tanjiro. Namely, Tanjiro couldn’t have met Kokushibou since Kokushibou is much older than Tanjiro, and there is no direct family relationship between them.

Tanjiro has a connection to Kokushibou’s brother, Yoriichi, but that is also not a direct relationship, as Tanjiro is directly related to Sumiyoshi, who was a close friend and acquaintance of Yoriichi, but they were not related by blood. There is nothing else that can be said about the relationship between these two characters.

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