Pretend Family (寄せ集めの家族 Yoseatsume no Kazoku?) is the 20th episode in the Kimetsu no Yaiba anime TV series.


When Rui assaults him with his Blood Demon Art, Tanjiro braces himself for certain death. As his life flashes before his eyes, he suddenly remembers his father's dance, the kagura, and unleashes a new, non-Water Breathing attack. Hinokami Kagura Dance. Knowing that he’ll be receiving a simultaneous blow from the demon, he uses his new move to slice off Rui’s head. As Tanjiro crawls towards Nezuko, who lies on the ground, riddled with wounds, someone appears before him.


Tanjiro collapses from his wounds and crawls towards Nezuko, who has fallen and isn't moving. He smells blood behind him and realizes he normally smells ash when demons were killed by his sword. Rui stands and puts his head back on. He tells Tanjiro he cut his neck with one of his own threads when he realized he would be decapitated by the nichirin sword, which would have killed him. Enraged, he encircles Tanjiro with threads to mince him, only for Giyu to arrive and save him. Giyu congratulates Tanjiro on holding out until he arrived. Rui throws a sheet of threads at Giyu, who uses Water Breathing's eleventh form (there are only ten officially) to shred them when they reach him. Giyu then beheads him. As the Daughter runs, she remembers when she was being chased by Demon Hunters and saved by Rui, promising to join his family. Rui fed her some of his blood, giving her her current appearance.

There were many siblings Rui had shared his blood with and he insisted they pretend to be a family. If they did something Rui didn't like he'd punish them, sometimes by wounding them, other times stringing them up and letting the sunlight kill them. Thus the numbers decreased to five. The Daughter comes across Murata and ensnares him in a cocoon filled with acid that will liquefy him, only to be knocked to the ground by Shinobu. After the Daughter begs for her life and blames Rui for her actions, Shinobu asks her how many people which she's killed, saying (smiling all the while) that once she tortures her appropriately for all the people she's killed (gouge out her eyes, rip out her organs, ect.), they can be friends and her sins will be forgiven. The Daughter refuses so Shinobu uses her Insect Breathing to approach and cut her neck with her sword. Shinobu's sword is sharp only at the tip as she lacks the strength to behead demons.

However, Daughter dies seconds later from the wisteria-based toxin Shinobu invented and coated her sword with. Shinobu then frees Murata. Tanjiro makes it to Nezuko and drapes himself over her body protectively. As Rui dies, he thinks he made the pretend family because he had no memories of when he was human, and he thought if he could feel a familial bond, his memories would come back. He looks upon Tanjiro and Nezuko, wishing he had what they had.

Characters in Order of Appearance

Anime Notes

Differences from Manga

  • The anime goes more into detail of the Spider Family's origin as well as show one of the Older Sister Spider Demon's memories which was not depicted in the manga.


  • Rui revealing that he himself cut his head.
  • Rui angry at Tanjiro.
  • Rui using Murderous Eye Basket.
  • Giyu saving Tanjiro from Rui.
  • Rui about to use Cutting Thread Rotation.
  • Rui using Cutting Thread Rotation.
  • Giyu using Eleventh Form.
  • Giyu decapitates Rui.
  • Daughter Spider Demon's fright.
  • Daughter Sister Demon Original form.
  • Daughter Spider Demon welcomed to the family.
  • Mother Spider Demon original form.
  • Mother Spider Demon getting punished by Rui.
  • The Daughter Spider Demon being asked to escape with one of her sisters.
  • Daughter Spider Demon capturing Murata with Ball of Yarn.
  • Shinobu meeting the Daughter Spider Demon.
  • Shinobu's lax demeanor.
  • Daughter Spider Demon witnessing Shinobu's attack.
  • Shinobu poisoning Daughter Spider Demon.
  • Shinobu introducing herself.
  • Murata saved by Shinobu.
  • Daughter Spider Demon dying from the poison.
  • Rui questioning why he was inclined to build a family.


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