Ren Amamiya, the blunt genius (lead, unpaid, credit given)

Ren Amamiya, Ultimate Genius (lead). He's brilliant, analytical, blunt, and competitive. He's the first to spot the loophole in the rules and the first to suspect that the kindest person in the room isn't what she seems. He's the intellectual rival of the mastermind, and he believes people can't be reduced to patterns.

Voice notes
Dry, sharp, and controlled. He doesn't shout. His intensity comes from precision, flat delivery, and a slight edge of impatience with people who can't keep up. Underneath that, he cares more than he lets on, especially as the story goes on, so there should be room for him to soften. Please don't play him as cold for the sake of it. He's blunt because he's paying close attention.