STD Devil
CharacterThe STD Devil personifies the fear of sexually transmitted diseases. Bound to Fumiko Mifune, its single contract powers one of the strangest schemes in the story: a self-replicating hive of identical women spread across the world through infection.
Appearance
The STD Devil has never been pictured, and its physical form remains entirely undisclosed. It is known only through its concept and the effects of the contract it grants.
Personality
No personality has been revealed for the devil, though one detail speaks volumes: it agreed to strike a bargain with a fourteen-year-old, which marks its morals as deeply suspect. The fear it draws on is the dread of contracting a venereal infection, a terror given extra weight by the era in which the story is set.
Abilities
Like every devil it can form contracts with humans in exchange for a price. Its known power, granted to Fumiko Mifune, is infectious duplication: anyone who has unprotected sex with her is overtaken and remade into an exact copy of her. Fumiko turned this into a deliberate worldwide campaign, seeding identical versions of herself across the globe and building a hive mind of Fumikos. The network lets her observe events everywhere and dodge true death, since killing one body simply leaves another to carry on. Each duplicate can even forge her own devil contract, and curiously the copies do not all share the same temperament or fears despite being the same person.
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Frequently Asked Questions
What is Fumiko's devil in Chainsaw Man?
Fumiko Mifune is bound to the STD Devil, which personifies the fear of sexually transmitted diseases. Its single contract powers her self-replicating hive of identical women.
Is there an illness devil in Chainsaw Man?
The STD Devil personifies the fear of sexually transmitted diseases, drawing on the dread of contracting a venereal infection.
What power does the STD Devil grant?
The STD Devil's known power, granted to Fumiko Mifune, is infectious duplication: anyone who has unprotected sex with her is overtaken and remade into an exact copy of her, which she turned into a worldwide campaign of identical Fumikos.
How did Fumiko Mifune survive in Chainsaw Man?
The hive mind of identical Fumikos created through the STD Devil's contract lets her dodge true death, since killing one body simply leaves another to carry on.
What does the STD Devil look like?
The STD Devil has never been pictured, and its physical form remains entirely undisclosed. It is known only through its concept and the effects of the contract it grants.
Sources & Information
Looking for more on STD Devil? The Chainsaw Man Wiki on Fandom has a dedicated page with community notes.
View on FandomThis content is original writing by Daddy Jim Headquarters based on the Chainsaw Man anime series, manga, and official materials. Episode and chapter references are cited where applicable.
Character and scene imagery on this site is original artwork by Daddy Jim Headquarters, not screenshots or licensed imagery. Official cover art is used on three types of pages for editorial commentary:
- Movie pages: theatrical posters and key visuals, credited to MAPPA and the Chainsaw Man Movie Project.
- Game pages: official promotional artwork, credited to the licensed publishers.
- Manga chapter pages: Jump Comics volume covers, credited to Shueisha and Tatsuki Fujimoto.
Official resources:
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