Summary
The Mother Spider Demon was a member of the Spider Family, appearing as a short woman with long white hair, red facial markings, and a voluptuous figure clad in a long white kimono with wide sleeves. Her current form starkly contrasts with her original, child-like appearance, which featured simple black hair, X-shaped marks in her pupils, and a flat chest, suggesting she extensively altered her look to satisfy Rui’s desire for a mother figure. Like most demons, she was cruel and murderous toward humans, yet she harbored a deep fear of Rui and the Father Spider Demon, who abused her for being weaker than anticipated. This severe mistreatment drove her to embrace death rather than endure further suffering. In her final moments, she seemed to regain her human memories and feelings, appearing genuinely moved by Tanjiro’s kindness as she wished him good luck. It was later revealed that she was technically the youngest among her "family" and struggled to suppress her lingering human emotions, often crying over past memories. This inability to act as a proper "Mother" to her older "children" resulted in harsh reprimands from Rui.
