Demonic Fan

Demonic Fan is a large metal contraption standing on four legs, each bent at two joints in a spider-like stance. Mounted at its core is an enormous fan whose three blades whirl at tremendous speed.

Little is known of its disposition, though like many Mysterious Beings it acted with hostility toward people.

The robot crosses paths with the Blizzard Group just after they bring down the criminal Banero, and it easily crushes the squad along with their leader, Fubuki. Fubuki's sister Tatsumaki swiftly pulls the machine apart before departing with her. When Saitama shows up and asks the only conscious member, Glasses, about the threat, he is told it has already fallen, yet the Demonic Fan begins piecing itself back together for another strike. Ignoring Glasses's warning, Saitama calmly smashes it to bits.

Rated a Demon-level threat, the machine was formidable enough to rout the whole Blizzard Group. Its huge propeller could kick up winds strong enough to crack concrete and spin up tornadoes, making it hard for anyone nearby to even breathe. It could also rebuild itself from a complete disassembly, and the only sure way to stop it was to destroy the propeller, though neither Tatsumaki nor Saitama had any trouble ending it.