Kanae Kocho/Relationships

Sanemi Shinazugawa
Not much is currently known about Kanae and Sanemi's relationship. Gyomei Himejima claims that Sanemi had a crush on Kanae, though we do not have conformation from Sanemi. We also do not know if these feelings were reciprocated.

Shinobu Kocho
Kanae was noted to have a very close and loving sisterly relationship with her biological younger sister, Kanae having been seen to be very close to Shinobu since early childhood and having spent their childhoods happily together with their parents.

The sister's bond was incredibly deep and caring, as seen where the two of them both took an oath to protect others from demons and ensure no one else goes through their tragedy upon the two of them surviving the Demon attack that killed their parents. During this time the sisters developed a unique familial dynamic, where Kanae would frequently make lighthearted, whimsical decisions without thinking first, which then causes Shinobu great expiration and worry due to her elder sister's behavior. But Shinobu is still shown to trust her sister deeply and support her sister's decision despite not initial agreeing with her at first, as seen when the two adopted and made off with their adoptive little sister Kanao Tsuyuri.

Later, Kanae's deep love for her sister was truly shown during her last moments after fighting Doma, where Kanae begged Shinobu to leave the Demon Slayer Corps and simply live her life free and happy, stating that the only thing that would make her happy is knowing that Shinobu would be able to live a full happy life and die peacefully as an old woman, showing just how much she loved her younger sister. Shinobu in turn showed her own immense love for her elder sister by swearing that she couldn't possibly live like that and begged her sister to tell her which demon killed her, swearing eternal vengeance against whoever killed her sister.