Who would win between these 4 former hashira?

Demon Slayer season 4 release date, plot, and more

Chapter 8 - Mugen Train - Demon Slayer: The Hinokami Chronicles Guide - IGN

All these hashira are marked and in a battle royale. Who's dying first and who's winning? : r/KimetsuNoYaiba

Can you list the nine Hashiras from weakest to strongest? - Quora

Who Is The Strongest Hashira In Demon Slayer - 12 Hashira's Ranked According To Strength, by Demon Slayer Funko Pop & Figure

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In Demon Slayer, who would win, all of the 9 Hashira against all of The Upper Six in a team battle? - Quora

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Demon Slayer: Who will defeat the Upper Moons in the Swordsmith Village? - Dexerto