Demon Slayer: Everything To Know About Shinobu, the Insect Hashira

gamerant.com:

The Hashira in Demon Slayer are a largely unexplained force, and they are major supporting characters in both the show and the movies. However, not nearly enough time has been spent developing their backstories. Viewers do know a little bit about Shinobu Kocho thanks to a small flashback where more is also learned about Kanao, who is not a Hashira, and through a short conversation that she had with Tanjiro. Shinobu is currently the Insect Hashira, and takes it upon herself to train and heal young slayers. In this, she is very different from many of the other Hashira who firmly believe in survival of the fittest.

Demon Slayer follows the story of Tanjiro Kamado and his younger sister Nezuko. His goal is to return his sister to her human form after she was turned into a demon in an attack that killed his entire family. He encounters the Hashira at a meeting wherein the fate of his sister is heavily debated. Once the debate ends with Nezuko being granted an exception to the kill all demons rule, Shinobu takes Tanjiro and his comrades in aiding in their training and physical recoveries.

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Shinobu has a younger sister, Kanao Tsuyuri who was adopted by her older sister Kanae Kocho. Kanae was the previous Flower Hashira, however, she was slain years prior to Tanjiro meeting Shinobu. Kanae however lives on and also practices Flower Breathing like their older sister. Shinobu was initially against raising Kanae as a part of her family but clearly grows to have a sisterly love for the younger girl by the time that Tanjiro and his friends encounter them. Her parents however were killed by demons while she was still very young. It was their deaths that drove her