"Does using Water Breathing really have much to do with what color your Nichirin Blade turns? I don't think there's much of a connection."
Tetsuya gave the Nichirin Blade in his hand a little shake, then slipped it back into its sheath.
"Although we used Water Breathing on Mount Fujikasane, we aren't swordsmen who specialize in it.
In fact, I don't even count as a swordsman."
Hotaru Haganezuka took a long moment to process that.
You aren't swordsmen who specialize in Water Breathing? You don't even count as swordsmen? What's going on here?
Tetsuya spread his hands. He was only telling the truth.
After all, back in the Shinobi World, he had never used a sword. The only times he had handled one were after seizing Kinkaku and Ginkaku's Seven Star Sword.
But in his hands, even the Seven Star Sword had been nothing more than a toy.
Besides, in the original story, Hotaru Haganezuka had expected Tanjiro's Nichirin Blade to turn red, even though Tanjiro was still using Water Breathing at the time.
From a certain perspective, though, Hotaru Haganezuka had been quite the prophet.
Urokodaki, on the other hand, wasn't nearly as surprised as Hotaru Haganezuka. If anything, he thought this made more sense.
"Black Nichirin Blades? Those are rare."
To him, black blades made more sense for geniuses like Tetsuya and Izuna, who had mastered Water Breathing merely by watching Sabito and Giyu use their Breathing Style a few times.
After all, if the two had first met swordsmen who used another Breathing Style, they might well have learned that one first instead.
For geniuses like them, judging the color of their Nichirin Blades solely by the Breathing Style they used wasn't particularly appropriate.
"Is there any significance to the way Nichirin Blades change color?"
Izuna had