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1. Public Bookmark 16

   Threaded Through Worlds by BTF_Kia

   Fandoms: One Piece (Anime & Manga), Harry Potter - J. K. Rowling, 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)  

   • Teen And Up Audiences
   • Graphic Depictions Of Violence
   • Gen
   • Work in Progress

   02 Mar 2026

   Tags

   • Graphic Depictions Of Violence
   • Harry Potter
   • Monkey D. Luffy
   • Sanji (One Piece)
   • Roronoa Zoro
   • Nami (One Piece)
   • Usopp (One Piece)
   • Marauders (Harry Potter)
   • Crossover
   • how do you do tags
   • Isekai
   • How Do I Tag
   • Harry potter X One piece
   • Alabasta (One Piece)
   • One Piece Universe
   • Harry Potter Universe
   • Demon Slayers (Kimetsu no Yaiba)
   • Demon Slayer Kamado Tanjirou
   • One Piece x Demon Slayer
   • no beta we die like men
   • Marauders Friendship (Harry Potter)
   • Marauders
   • Marauders Era (Harry Potter)

   Summary

   Thrown onto the Straw hat crew due to a reckless decision, Harry potter must face the One Piece world along with the Straw hats. Leaving his responsibilities and friends back at the Wizarding World with the idea of his 'death.'

   Literally flying onto the Going Merry is Tanjiro Kamado! Helping him find his footing is Harry, who is also faced with the chaotic Straw Hats and the act of joining; both must navigate this golden age of privacy with the hanging guilt of leaving everything behind.

   Old friends and family join Harry and Tanjiro into the One Piece world, perhaps they will collide and come face to face with someone thought dead.

   (Bad Summary, I didn't like the AI one, so i wrote it myself. A weird triple crossover fanfic with popular fandoms)

   Language:

   English

   Words:

   29,945

   Chapters:

   9/?

   Comments:

   9

   Kudos:

   40

   Bookmarks:

   16

   Hits:

   1,508

   Bookmarked by InfoGoblin

   07 Nov 2025