Tanjiro and Nezuko
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 well-mannered, 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. After Muzan turns Tanjiro into a Demon, Nezuko is the only person who he does not try to kill or purposefully harm, even after she clings to him and blocks one of his attacks. This might be possible due to Muzan only asking him to destroy the Demon Slayer Corps.
Tanjiro and Nezuko
Tanjiro and Nezuko are the most popular siblings in the Demon Slayer series. They have been through a lot during the series and have supported each other in the toughest of times.Nezuko assisted Tanjiro and protected him numerous times while Tanjiro swore to find a cure for Nezuko. Their interactions are extremely wholesome, especially towards the end of the series.
Kyojuro
Kyojuro was a responsible brother and helped Senjuro with things he struggled with. Despite having a father, Kyojuro spent most of his time looking after Senjuro whenever he wasn’t assigned on missions. He was extremely kind and Senjuro looked up to him and loved him. Senjuro was heartbroken when he heard about his brother’s death, and Tanjiro was there to comfort him during that difficult period.
