Hajime claps his hands slowly when he was revealed to be the mastermind. He doesn't even bother to try and defend himself anymore as it would be useless. You already made several points, there's no use in denying. His "smile" turn into a scowl.

"Good job in finding out the mastermind! What's next? Huh? Getting me executed? No..I don't think I'll want to do that yet."

He crosses his arms in an irritated manner. His profession has been revealed and there's nothing anyone could do, he's still the one in control after all.