Kihara Gensei is a shadowy figure in Toaru Kagaku no Railgun and a member of the notorious Kihara family. He's defined by a single obsession: achieving Level 6 esper status—an ambition that's driven him to make repeated, increasingly desperate attempts.
Best known for creating the Ability Body Crystal, Gensei's work sets off a chain reaction that essentially kicks off the Railgun storyline and reverberates through Toaru Majutsu no Index, affecting multiple characters down the line. Fans and critics often point to him as the de facto main antagonist of Railgun, given how thoroughly his machinations shape the narrative.
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