So we have three swordbearers, all using the iai-based white purity style that goes for a single lethal hit
Samura will aim for Chihiro
Chihiro will aim for Hirohiko
And Hirohiko will aim for... Iori.
Samura will change his target and try to save Iori, getting injured or dying in the process
Most likely it won't go down exactly like that, since we haven't really seen much of what Kumeyuri does and it wouldn't be an epic battle without the swords getting used, but I do think Iori is going to get caught up in the crossfire