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Kaitabi Hatsuya is a character from the Toaru Kagaku no Railgun side-story. He's registered in Academy City's databank as a level 2.



 
Hatsuya is the culprit of the Graviton bombings in the series' Level Upper arc. His own powers were elevated to be closer to that of a level 4 than his level 2 status registered in Academy City's databank.