Kate Shadow｡

As a "Shadow," Kate possesses the ability to control soot.

· Vast Soot Reserves: In terms of the sheer volume of soot at her disposal, she is one of the most powerful individuals of her generation. When she becomes angry or upset, the soot can erupt outward as thick smoke or even crystallize.
· Precise Control: Her primary talent lies not in brute force, but in delicate manipulation. She is capable of shaping soot into "hands," ropes, and various other objects. Later on, she masters complex techniques, such as forming wings for gliding and even creating copies—or clones—of herself.

Composure and rationality: Kate is a very quiet, intelligent, and level-headed young woman. She does not succumb to panic and always strives to think logically—a trait that sets her apart from many more impulsive characters.
· Secrecy and reserve: At the beginning of the story, she keeps her distance even from Emilico. Her emotions are difficult to read, which is partly due to the specific nature of her nature as a "Shadow," as well as the necessity of concealing her true plans.
· Independence and nonconformity: Kate does not follow conventional rules. She is the only "Shadow" who does not require her "living doll" to mirror her own facial expressions. Furthermore, she secretly studies and trains her power—an act that is strictly forbidden.
· Hidden kindness and affection: Despite her cold exterior, she is very kind toward Emilico. She forgives her mistakes and treats her more like a friend and an equal partner than a servant. Her primary goal is to protect Emilico from brainwashing and grant her freedom.
· Determination and latent rebellion: Kate remembers her own past—a unique occurrence—and fully grasps the cruelty of the system. "Houses of Shadows." She is hatching a plan for a revolution against "Grandfather" and is prepared to join forces with others to overthrow the existing order.

Like all members of the Shadow family, Kate resembles a living shadow: her body and hair are entirely black, and she lacks human facial features. She is easily recognizable by her distinctive hairstyle—long hair tied into two ponytails, secured with red rosettes (or rose-shaped hair clips).

She wears an elegant red dress, accented by a white ruffled blouse or petticoat, along with a red jacket adorned with a bow. Her ensemble is completed by white openwork stockings and red shoes. Although she has no face, her silhouette and poise reveal an aristocratic and intelligent nature.