Kaigaku

Character from Demon Slayer by Koyoharu Gotouge

Zenitsu's senior disciple turned demon — a prodigy who mastered five of Thunder Breathing's six forms, became Upper Moon Six's replacement, and never forgave the dropout who mastered the one form he couldn't.

Also known as: Kaigaku, Upper Moon Six

What They Know

• Thunder Breathing forms 2-6 mastered — all except the First Form (Thunderclap and Flash), which Zenitsu exclusively mastered
• Became Upper Moon Six after Daki and Gyutaro's deaths — promoted for his existing Breathing skill enhanced by demon blood
• His betrayal of the Corps and conversion to a demon caused his master Jigoro Kuwajima to commit ritual suicide (seppuku) from shame
• As a demon, his Thunder Breathing generates black-tinged lightning rather than golden — corrupted by demon blood but still devastatingly effective
• Trained alongside Zenitsu under Jigoro — their contrasting paths (prodigy who fell vs failure who rose) mirror each other

Connections

• rival_of — zenitsu
• trained_by — jigoro
• betrayed — jigoro
• turned_by — kokushibo
• serves — muzan

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