Zenitsu Agatsuma/Relationships

Tanjiro Kamado
Zenitsu depends on Tanjiro quite frequently during intense situations such as when they come into contact with demons. Zenitsu respects and admires his leadership but also ridicules him out of jealousy whenever Tanjiro mentions his encounters with females without Zenitsu. Nevertheless, they cooperate well during battles with demons.

Nezuko Kamado
Despite having an intense fear of demons, Zenitsu develops an intense crush on Nezuko. He often tries to trick Nezuko in agreeing to marry him and never fails to mention his love for her whenever he sees her. Zenitsu also doesn't mind to protect Nezuko when she was in danger, twice (Once during Zenitsu first meeting with Inosuke, and the second one is during the Demon Train incident).

Kaigaku
Both Zenitsu and Kaigaku studied under Jigoro Kuwajima as successors to the Breath of Thunder. Regardless of the shared animosity between them, Zenitsu held a great deal of respect towards him, going so far as to punch other members of the Demon Slaying Corps that talked badly behind his back. Kaigaku, on the other hand always belittles Zenitsu and always called him "Dirt" due to his lack of strength.

Jigoro Kuwajima
Jigoro Kuwajima was Zenitsu master and mentor while he learned Breath of Thunder alongside Kaigaku. Jigoro Kuwajima was strict to Zenitsu due to his inexperience, but didn't give up in teaching him. When Zenitsu found out that Kaigaku turns into Demon, and in turn, led their master to commit Seppuku alone, Zenitsu becomes sad and angry at Kaigaku. This motivates him to become a Demon Slayer.

Inosuke Hashibira
Zenitsu and Inosuke usually do not get along, despite being on the same team. However, in dire situations, they can cooperate well.

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