She is prideful and becomes extremely angered when ordered by other people. When she was a human she had an honest personality that was easy to influence causing her to become very harsh like her older brother, following his words of 'take before you're taken and collect'. She thought very highly of herself, dismissing all non-Hashira Demon Slayers as not worth her time, and getting incensed when Tanjiro Kamado spoke to her, because she looked down on him.