Nezuko Kamado/Relationships

Tanjiro Kamado
Tanjiro is the elder brother of Nezuko and her only remaining family member alive after her family was killed. As such, Nezuko, who is usually calm and adorable, will become enraged and attack any demon who harms Tanjiro. Being the sole surviving members of a poor family, the siblings are very close, trusting and loving of one another. He is likely the only one capable of actively calming Nezuko down by calling her name or singing to her their mother's lullaby.

Zenitsu Agatsuma
Upon seeing her for the first time, Zenitsu fell in love with her at first sight. According to the databook she sees him as a "weird dandelion". Although the two are rarely seen interacting together, Zenitsu treats her with affection and care.

Despite his cowardly nature, Zenitsu mustered the courage to travel to Natagumo Mountain upon realizing that Tanjiro (and by proxy Nezuko) were in the territory of the Spider Family, intending to protect her. During their time undergoing recovery training, Zenitsu would narrate to her stories about Tanjiro and their missions while she was in her box, to which she responded by moving while caged, implying she was happy to listen to him.

As Nezuko returns to humanity she starts to remember her time as a Demon and in particular a memory of Zenitsu gifting her flowers, hinting she does see him in a good light.

Yushiro
At first, Nezuko was threatened by Yushiro's presence as she sensed that he was a demon, however after she saw that he showed no ill intent or harm towards her or Tanjiro, she saw him as no threat and stopped being wary around him.

Later on, after their battle with the Temari demon and Arrow demon, she sees Yushiro as one of her younger siblings and begins patting his head, much to his dismay.