Uchiha Hikari spent a little more time locating and sealing the third fat demon in the house.
Having witnessed it with his own eyes, Agatsuma Zenitsu finally believed what Tanjiro had said about their "senior." The way he looked at her became somewhat more complicated.
Afterward, Uchiha Hikari returned to the car to report the test results to Bulma.
Meanwhile, Tanjiro and the others began rescuing the hostages who had been brought there, helping bandage the wounded and sending them back to nearby villages.
Once everything had settled down, Hashibira Inosuke, wearing a boar's head mask and not exactly the sharpest tool in the shed, arrived late. Mistaking Bulma's car for a monster, he had a minor conflict with Uchiha Hikari's group.
Uchiha Hikari easily subdued Inosuke, giving the group a small taste of Naruto-style taijutsu, then proposed observing the "Breathing Techniques" each of them practiced.
The "Breathing Techniques" of the Demon Slayer World originated from Tsugikuni Yoriichi's "Sun Breathing."
They were breathing techniques developed and refined by demon hunters over several centuries so that humans could fight demons. By adjusting one's breathing through special methods, they greatly strengthened the heart and lungs, dramatically enhanced physical abilities, and allowed humans to reach a level comparable to demons.
After Tsugikuni Yoriichi's death, Sun Breathing was lost. Only the five Breathing schools derived from it remained—Water, Flame, Wind, Thunder, and Stone—as well as their respective offshoots.
Tanjiro practiced Water Breathing, Agatsuma Zenitsu practiced Thunder Breathing, while Hashibira Inosuke used his self-created Beast Breathing, which was relatively close to Wind among the five basic styles.
"Water Breathing, First Form: Water Surface Slash!"
"Second Form: Water Wheel!"
"...Tenth Form: Constant Flux!"
In a clearing in the woods near the House of Demons, Bulma and a Shadow Clone were laying out a picnic blanket,