Kaigaku and Zenitsu

First Style: Lightning Thunder Roll (Kimetsu no Yaiba Wiki) - The swordsman makes a sharp dash forward and delivers a lightning-fast strike while drawing his blade.

Second Style: Ball Lightning - A series of five direct attacks, all carried out in an instant.

Third Style: Humming Mosquito Thunder - A circular attack that creates a wave of strikes in all directions.

Fourth Style: Distant Thunder - A sharp attack that allows you to hit an enemy from a distance.

Fifth Style: Heat Lightning - a crushing slashing blow, accompanied by a flash that "burns" the enemy's flesh.

Sixth Style: Electric Rumble - A continuous barrage of countless slashing blows that tear apart the target's body.

Jiguro is an elderly man. A formidable teacher and a stern disciplinarian. He teaches Zenitsu and Kaigaku thunder breathing techniques. He treats both boys with equal severity.

Kaigaku and Zenitsu don't get along very well. As the former Thunder Pillar's older and more skilled apprentice, Kaigaku often acts as the bully, mocking Zenitsu and even beating him up. Zenitsu acts as the victim, tolerating and allowing this behavior.

Zenitsu A young man with fair skin and golden-brown eyes. He has short yellow hair with orange tips, which was turned that way after being struck by lightning during training (his hair was originally black). He wears the standard dark brown Demon Slayer uniform, over which he wears a bright yellow-orange haori with a white triangular pattern. Zenitsu suffers from low self-esteem, is constantly afraid of death, and begs for the protection of others. Zenitsu is approximately 14 years old and no more than 165 centimeters tall. Of the six thunder kata, he only knows the first.

Kaigaku A young man with black hair and piercing turquoise eyes. Over his demon slayer uniform, he wore a black kimono, belted with a blue sash with yellow trim. Around his neck, he always wore a bead necklace reminiscent of his teacher's. Kaigaku was extremely vain. He couldn't forgive Jigoro for considering him and Zenitsu equal, and he craved sole recognition of his own strength. Kaigaku is approximately 16 years old and no more than 167 centimeters tall. He knows five of the six thunder kata except the first.