The arrival of the Hashira shifts the focus to the Demon Slayer Corps rules regarding Tanjiro and Nezuko.
While Giyu holds Shinobu in a headlock, Kanao Tsuyuri pursues the siblings. Nezuko avoids her slashes by shrinking into a smaller, "adorable" form to escape. Aftermath and Cliffhanger Kimetsu no Yaiba Episode 21
When his parents discovered his monstrous nature, they attempted a murder-suicide to stop his sins. In a rage, Rui killed them, believing their bond was fake. The arrival of the Hashira shifts the focus