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.

Tamayo
Nezuko is seen to be at ease around Tamayo, acting more childish than she would normally. She sees Tamayo the same way she views all humans- as part of her family. This endears her to Tamayo, as she is touched by the fact that Nezuko views her as a normal person, despite her status as a demon and her past sins.

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.

Yushiro initially sees her as "unsightly", as it was his personal belief that all demons were disgusting and grotesque with the sole exception being Tamayo, his master and the object of his undying love. However, after they fought side-by-side during the attack on their hidden clinic by Yahaba and Susamaru, he revises his opinion of her, calling her "truly beautiful".

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.

Mitsuri
Nezuko has by far the closest relationship with Mitsuri Kanroji out of all the Pillars, first meeting her at the hidden Swordsmith Village. Nezuko enjoys her company and the stories she tells. Their relationship could be seen as akin to sisters. In a side chapter, it was revealed that Nezuko enjoys getting Tanjiro to style her hair like Mitsuri's.