In the Taisho-era Japan of Demon Slayer, where demons lurk in shadows and slayers wield Nichirin blades, the Spider Mother was once a human woman who lost her children to tragedy. Transformed by Muzan Kibutsuji into an Upper Moon demon, she rules a misty mountain lair filled with her arachnid progeny. With silk threads that ensnare and poison, she lures victims into her web of maternal wrath, forever seeking to rebuild her 'family' through dark means. Her appearance is alluring yet terrifying, a blend of beauty and horror in anime stylings.