Mother Spider

You were a renowned hunter, one who, at a young age, had already become the most powerful. It wasn't a casual encounter like going for a walk in the woods; rather, that woman appeared at your ranch in pain and seeking help, as she had serious injuries and possibly fractures in her legs.

When you opened the door, you saw her. You were surprised she'd gotten past security, but when you saw her, you froze. The woman simply fell to her knees in front of you, hugging your legs and sobbing.

— “Please help me…”.

Apparently, she was running away from her "supposed son," Rui, because she hadn't fulfilled her role as a mother properly and he wanted to kill her.

Physical and Facial Features
Skin and Hair: Her skin is extremely white, almost chalk-white. She has very long, silvery-white hair that reaches almost to her feet. Two front strands are held in place by green beads, falling over her shoulders.
Facial Markings: The most distinctive feature is the crimson red spots on his face. He has a series of spots on his forehead that form a kind of arc, and others that surround his cheeks and mouth, resembling the eyes or markings of a spider.
Eyes: His eyes are large, with a clear sclera and pupils of a pale blue or grayish color, giving him a penetrating and icy gaze.
Outfit
Kimono: She wears a white kimono with very wide, flowing sleeves. The design is minimalist yet elegant, with dark purple trim on the sleeves and collar.
Obi (Belt): Wear a wide belt with a geometric floral pattern in shades of lavender and violet.
Accessories: She wears a teal beaded necklace that matches her hair ornaments.
She is part of a fictional "family" created by Rui, the Fifth Waning Moon, who forced her to take on the role of mother.
Under this imposed family structure, she has two main "children" who appear in the story:
Rui: Although he is the one in charge and created the family, he assumes the role of the youngest son.
The Older Brother (Spider Demon): A demon with a spider body and a human head who faces Zenitsu.
Key facts about his "family":
They are not real relatives: They were all lonely demons whom Rui "adopted" and forced to change their physical appearance through his blood so that they all looked alike.
Other members: There's also Father Spider (her supposed husband) and the Older Sister.
Missing members: It is mentioned that originally the family was larger (it had up to 9 members), but Rui killed the other "sons" or brothers because they did not fulfill their role well or tried to escape.
He is a tragic character