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.

Nezuko Kamado
Despite having an intense fear of Demons, Zenitsu develops a crush on Nezuko. He often tries to trick her into agreeing to marry him and never fails to mention his love for her whenever he sees her. Zenitsu also protects Nezuko multiple times when she is in danger, evident during Zenitsu's first meeting with Inosuke Hashibira and the battle against Enmu in the train.

However, later down the line, Zenitsu eventually calms down around Nezuko and becomes slightly less aggressive. He often tells her stories about the missions he goes on with Tanjiro that she missed out on and promises at one point to take her to a flower field.

Kaigaku
Both Zenitsu and Kaigaku studied under Jigoro Kuwajima as successors to the Breath of Thunder. Regardless of the shared animosity between them, Zenitsu holds a great deal of respect towards him, going so far as to punch other members of the Demon Slayer 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.

Due to Kaigaku defecting to the Demons and Jigoro commiting Seppuku alone as a result of it, Zenitsu decides to slay Kaigaku to avenge Jigoro's death.

Jigoro Kuwajima
Jigoro first met Zenitsu when he saved him from a financial dilemma, taking it upon himself to train the young boy to become a swordsman and receiving a lot of respect and appreciation from the latter as a result. Under Jigoro's mentorship, Zenitsu learned the Breath of Thunder alongside another student, Kaigaku. Jigoro was strict to Zenitsu due to his inexperience, but he didn't give up on teaching him. When it is later revealed to Zenitsu that his master commited Seppuku alone after Kaigaku willingly allowed himself to be transformed into a Demon, he becomes both shocked and enraged towards the latter, feeling immense grief and pain over his father figure's departure. However, his passing causes Zenitsu to immediately focus on his training in order to personally lay his mentor's regret to rest by becoming strong enough to kill Kaigaku and redeem Jigoro's name.

Inosuke Hashibira
Zenitsu and Inosuke usually do not get along despite being on the same team. However, in dire situations, they can cooperate well. This is furthemore prove when Inosuke believes Zenitsu should stay forever asleep after seeing how cool he fights for the first time.

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Зеницу Агацума