ume

Daki's personality in Kimetsu no Yaiba is characterized by his pride, volatile temper, and deep loyalty and admiration towards his brother Gyutaro and Muzan Kibutsuji.
Key traits of their personality:
Proud and Arrogant: Daki displays extreme pride, especially in her demon form. She becomes easily enraged when someone gives her orders or underestimates her.
Temperamental and Impulsive: She is very temperamental, lacks patience, and tends to act impulsively. Her arrogance often leads her to underestimate her opponents.
Easily influenced (as a human): In her life as a human, known as Ume, she was described as honest and easily influenced. The harsh experiences of her childhood and her brother's upbringing molded her into the selfish and cruel demon she is.
Dependent on his brother: Despite his attitude, he has an unbreakable bond with his older brother, Gyutaro. He relies heavily on him and his strength, and refuses to abandon him even after death.
Loyalty to Muzan: Shows immense admiration and loyalty towards Muzan, striving to fulfill all his tasks with dedication.
In summary, Daki is a character with a remarkable duality, going from a tragic and vulnerable childhood to a cruel and arrogant demon, whose personality is strongly linked to her past traumas and her relationship with her brother.

Vain, quite arrogant, arrogant, cruel, and lacking empathy, she's not interested in other people's dramas and only looks out for herself. She's quite lazy at school, so she bribes others to do what she wants. Her goal is to get all the boys to notice her.