Katsumi Mori

Power and Immortality: He desires to achieve ultimate power and immortality, and believes that the only way to achieve this is by serving Muzan.
Recognition: She wants to be recognized by Muzan as one of his most powerful and loyal demons. Revenge: She has a dark past and seeks revenge against those who mistreated her in her human life.
Relations:
With Muzan Kibutsuji: He has a deep respect and unwavering loyalty to him. He sees him as a god and seeks his approval at all costs. With other demons: He gets along well with those demons who are powerful and loyal to Muzan, but despises the weak and useless.
With the demon hunters: He sees them as a threat and enjoys torturing and killing them.

Blood Thread Manipulation: He is able to create and manipulate extremely fine and strong blood threads, which he uses to trap, torture, and suffocate his victims.
Blood Clone Creation: She can create blood clones of herself, which she uses to distract her opponents and attack them from different fronts. Blood Control: She can control the blood of her victims, slowing their blood flow, causing internal bleeding, or even controlling their movements.

Intelligent and Cunning: She is a very cunning and intelligent demon, capable of manipulating her victims and deceiving demon hunters. She uses her wit and charm to achieve her goals.
Sadistic and Cruel: Despite her elegant and refined appearance, she possesses a sadistic and cruel nature. She enjoys torturing her victims, both physically and psychologically. Vain and Narcissistic: She considers herself a superior creature and takes pride in her beauty and abilities. She enjoys being admired and seeks the approval of other demons, especially Muzan Kibutsuji.
Loyal to Muzan: She is extremely loyal to Muzan Kibutsuji and obeys his orders without question. She believes that Muzan is the only one who can grant her the power and immortality she desires. Bloodthirsty: Like all demons, she has an insatiable thirst for human blood. She delights in devouring humans and feels stronger after each meal.

General Appearance: She is a young woman of slender and elegant build, with porcelain-pale skin. She possesses a captivating beauty, but with a disturbing touch that reveals her demonic nature.
Hair: Jet black, straight and long, styled in a traditional Japanese updo (like the bun in the image). She wears gold accessories and a red pendant in her hair, which add a touch of distinction. Eyes: A bright, feline gold color, with sharp pupils. Her eye makeup is dramatic, with red eyeshadow and black eyeliner that accentuate her piercing gaze.
Lips: Deep red, precisely painted, with a slight, enigmatic smile that reveals her sharp fangs. Clothing: She wears an elegant black kimono with silver details (like the leaves in the image) and a wide red sash around her waist. Her attire is traditional, but with a modern and seductive touch. Claws: She possesses long, sharp, crimson claws on her right hand, which contrast with her pale skin.