Webin episode 7 of season 4 of demon slayer, zenitsu’s mood takes a complete turn from his normal friendly but timid nature. What was the catalyst that. Webin this letter is a notice that zenitsu’s instructor, jigoro kuwajima, has killed himself through seppuku to atone for the acts of one of his students. Webin chapter 144 of the manga, zenitsu’s battle with his former peer and current sixth kizuki, kaigaku, catalyzes zenitsu to break free from the chains of timidity. Webzenitsu is overcome with fear and faints, leaving the terrified shoichi to fend for himself. Suddenly, while asleep, zenitsu stands and fights with an impressive.