Fujin and Raijin are a duo of outlaw ninja whose home village is unknown. Enormous, dull, and ruled by a bottomless appetite, the pair earned their mocking nickname honestly, yet their brute power once invited comparison to Tsunade herself.
The Legendary Stupid Brothers are a pair of criminal ninja who hail from an unnamed village. Bulk and foolishness define them in roughly equal measure, and their entire existence revolves around the hunt for food.
Of the two, the elder Fujin acts as the thinker and leader, while the younger Raijin trails his cues and tosses out simple questions that draw equally simple replies. Food dominates their every thought, and they carry enough arrogance to call any meal they extort an offering. Dim as they are, their raw might has been likened to Tsunade's, though she still brushed them aside with ease, and they proved strong enough to overrun even a seasoned jonin like Shizune and her whole team.
Their loyalty flows to whoever feeds them. When Mizuki broke out of his cell to bring them food and dangled the promise of a grander feast under Orochimaru, they warmed to him and began addressing him as Aniki, a gangster's term for a superior. The bond between the brothers themselves is genuine as well: when Ino Yamanaka hijacked their minds to turn one against the other, each sensed the wrongness at once and tried to shake his sibling free.
Fujin, the older sibling, functions as the pair's leader, while the younger Raijin follows his lead. A past run-in with Tsunade of the Sannin left both terrified at the mere sight of her, though the details of that meeting were never explained. Their crimes turned monstrous when they slew their own comrades over food during a mission, then went calm as if nothing had happened.
Locked away in the Konoha Strict Correctional Facility, the two occupied a cell that could not truly hold them. Only the guards' careful rationing of meals kept them cooperative, since hunger would send them smashing through the door to demand food before settling once fed. Tricked by Mizuki into rioting and escaping on the promise of Orochimaru's endless feasts, they caused trouble for Naruto and Team Asuma until Tsunade intervened, cowing them with strength enough to launch them with a single flick and luring them back by warning they would miss dinner. Their names echo the Shinto deities Fujin and Raijin, ogre-like gods of wind and lightning.

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Yes, Fujin and Raijin are the two brothers who make up the Legendary Stupid Brothers, with the elder Fujin acting as leader and the younger Raijin trailing his cues.
Tsunade defeated Fujin and Raijin of the Legendary Stupid Brothers, brushing them aside with ease and cowing them with strength enough to launch them with a single flick.
The Legendary Stupid Brothers, Fujin and Raijin, are named after the Shinto deities of wind and lightning, but their mocking nickname reflects their enormous bulk and foolishness.
The Legendary Stupid Brothers were locked away in the Konoha Strict Correctional Facility after slaying their own comrades over food during a mission.
Mizuki broke out of his cell to bring the Legendary Stupid Brothers food and dangled the promise of a grander feast under Orochimaru, winning their loyalty so they rioted, escaped, and caused trouble for Naruto and Team Asuma until Tsunade intervened.
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