Vol. 4The Empire’s Expanding War
Tetsuhiro led the Demon Slayer Corps and allied forces through their final battles against Muzan, then expanded the Empire’s campaigns into the Americas before returning to Duel Academy. The group was transported to the Spirit World, where Tetsuhiro carried the unconscious Cobra toward the academy.
- Urokodaki’s reserve squad confronted Daki and Gyutaro, and Hiruzen’s team arrived to defeat the Upper Rank Six demons and treat the injured.
- After Yoriichi defeated Tetsuhiro in a spar, the Corps finished a month of training and began an exam that sent shinobi and Demon Slayer teams toward Mount Fujikasane.
- Tanjiro’s and Hiruzen’s teams defeated the dragons and [Black Luster Soldier], and Tetsuhiro declared the Demon Slayer Corps the exam winners with Murata as the top finisher.
- Zenitsu confronted Kaigaku, and after Tengen and Gyomei joined the fight, Zenitsu killed him with Thunder Breathing’s Seventh Form: Fire Thunder God.
- Genya, Sanemi, Muichiro, and their allies fought Kokushibo until Yoriichi appeared, defeated him, and honored Genya’s discovery of the broken Bamboo Flute.
- Alex’s contacts helped the Empire target officials and criminals, while Florida began a sweeping cleanup and the Florida Four Heavenly Kings drew law-enforcement attention.
- The Empire defeated the American forces, rescued abused children from Lolita Island, and imposed a new order across the Americas while Yozai managed affairs in Tetsuhiro’s absence.
- Little Light Man engulfed the island in white light, and the group awoke in the Spirit World beneath three suns and a dark green sky.