[Drifloon]

And agh, Meta-Battler figured it out that quickly? I didn't figure out the culprit until my 9th choice.

Honestly, it's pretty easy to do by process of elimination.

Spoiler for Inquisition:

The six in the shed were the only ones without alibis so it had to be one of them; three were servants and thus innocent; Eva would feel guilt from killing Hideyoshi which violates Van Dine; Natsuhi would feel guilt from killing Krauss which violates Van Dine. All you have left is Nanjo.

I did get to witness all the murders, though.