How did Tanjiro become a demon?

Related posts:

1. Who will Tanjiro marry? Who will Tanjiro marry? Tanjiro and Kanao would eventually marry and start a family, having two great-grandchildren by the names of Kanata Kamado and Sumihiko Kamado between them....
2. What is Sun Breathing 13th form called? What is Sun Breathing 13th form called? Hinokami Kagura (ヒノカミ 神楽 かぐら , Hinokami Kagura?, lit. Dance of the Fire God) is a Breathing Style only known and taught by the Kamado Family, later revealed to be the first Breathing Style, Sun Breathing ( 日 ひ の 呼 こ 吸...
3. Why does Tanjiro’s sword turn red? Why does Tanjiro's sword turn red? In the manga, at one point Nezuko burns the blade with her blood to create a temporary flaming sword. It's also stated one of the Breath of Sun users had a black sword that turned red when used. In short, it's a type of...
4. Why did Tanjiro stop Breathing? Why did Tanjiro stop Breathing? Tanjiro was too exhausted to perform the Hinokami Kagura and not suited for Water-Breathing, so he desperately combined the two Styles to save Hinatsuru from Gyutaro's grasp. Breathing Styles are the cornerstone of the Demon Slayer Corps' battle against Muzan Kibutsuji's demons....
5. Why was Tanjiro not born with the mark? Why was Tanjiro not born with the mark? As it turns out, the scar on Tanjiro's forehead does have some significance to it, rather than simply being a Todoroki-esque burn from scalding water. Tanjiro was not born with this scar on his head; rather, he acquired it when tackling his...
6. Who is Inosuke’s wife? Who is Inosuke's wife? Kotoha Hashibira Kotoha deeply loved and cared for Inosuke as a baby....