Kie is a woman with a noticeably light complexion, kind, dark purple eyes that appear a lighter color around the rims of their irises, and a small beauty mark located on the left of her face below her lower lip. She has black hair, worn tied back in a messy bun with a few loose strands left to dangle over her face.
She wears a purple and cream checkered kimono with a white and long-sleeved Kappōgi over the top, also sporting a length of white cloth that she wears around her head, covering most of her hair.
Kie is a warm and loving person; as the mother of 6 children, she is always seen displaying a very affectionate and caring personality. Since she is a single mother, Kie always tries to be as warm and kind to her children as she can to fill the gap her husband left. She is very protective of her children, but at the same time teaches them to be independent.
Kie also demonstrates a positive and encouraging vibe, especially during her appearance in Nezuko Kamado's subconsciousness, encouraging her to wake and help her brother to fight and telling her to do her best.
At some point in her life, Kie married Tanjuro Kamado and had their six children. After her husband’s death, she was left to take care of them by herself, managing to support and keep safe her whole family through all of the hardships they faced.
At the very beginning of the story, in the evening, Kie stops her son, Tanjiro, before he leaves to sell a basketful of charcoal. She notes that his face is dirty, and kneels down to wipe off the ash from each of his cheeks, telling him that he doesn’t need to go down to the village and sell charcoal on such a snowy night. Tanjiro replies that he wants to go so everyone can eat to their heart’s content, and Kie smiles and thanks him. As her other children gather around Tanjiro, complaining that they want to go down with him, Kie tells them that they can’t because they can’t walk as fast as him, and can’t be carried by cart since he isn’t taking it.
Kie and the rest of their family wave Tanjiro off, hoping for his safety and quick return.
- Like her son Tanjiro, Kie had a very hard forehead, being able to even defeat a wild boar by headbutting it.