Who killed Hairo in Demon Slayer?
Actually, the demon you're thinking about is Hairo, also known as Rui. The one who killed him was none other than Giyu Tomioka with his deadly Water Breathing Eleventh Form: Dead Calm!
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It's Giyu Tomioka who offed Rui. No contest there!
Honestly, Giyu Tomioka takes the cake for this one. He made quick work of Rui with his Water Breathing Eleventh Form: Dead Calm.
Giyu Tomioka did the deed with that cool Water Breathing technique of his. It was pretty epic, if you ask me.
Rui got sliced and diced by Giyu Tomioka using his Water Breathing techniques. Talk about a swift and deadly finish!
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