User blog comment:EmirK/Who do you want for the main antagonist in Toaru Kagaku no Accelerator?/@comment-24001115-20131014110510

I mostly agree with you, but i don't think that there would be an antagonist of the Magic Side - not directly. I mean he didn't know about Magic before he was defeated by Aiwass (Dragon Arc). And i don't think the Magic side (except Aleister Crowley) would have any interest in Accelerator than in Kamijou Touma, but i can be wrong...

So I would say the Kihara family would most probably be the antagonist. (Because Kihara Kagun said that he is the best in anti-Kihara Battles and the only Kihara that i saw he fought was Kihara Amata)