Who would win between these 4 former hashira?

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Demon Slayer: Hashira Meeting

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Demon Slayer Season 2: Mugen Train Arc premiere recap: Kyojuro Rengoku is back! - CNET

Former Hashira vs Current Hashira Power Levels

4 Demon Slayer characters who could steal the spotlight in season 4 (& 4 more who likely won't appear)

Demon Slayer Season 4 Announced, Will Cover Hashira Training Arc - Anime Corner

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

What will Demon Slayer Season 4 be about?