: When his parents discovered he had to consume humans to survive, they attempted to kill him to atone for his sins, intending to die with him.
: In his final moments as a demon, Tanjiro senses Rui’s unbearable grief and reaches out to him. Rui is spiritually reunited with his parents, who promise to stay with him even in hell. Confrontation of the Hashira Kimetsu no Yaiba (Dub) Episode 21
Following Rui's death, the focus shifts to the arrival of the higher-ranking Demon Slayers. : When his parents discovered he had to
: Misinterpreting their actions as a betrayal of their bond, Rui killed them. It was only in their final moments that he realized his mother had been apologizing to him, and they truly loved him. Confrontation of the Hashira Following Rui's death, the
: Giyu Tomioka steps in to protect Nezuko and Tanjiro from Shinobu Kocho, who intends to execute the demon.
: During their standoff, Shinobu famously teases Giyu, telling him that "nobody likes him," which leaves him visibly shaken and provides a rare moment of comedy.
: The episode ends on a high-stakes cliffhanger as Tanjiro awakens at the Demon Slayer headquarters, facing the assembly of the elite Hashira for the first time. Demon Slayer: Kimetsu no Yaiba Season 1 Episode 21 Recap