If "Friend" is Sadakiyo, only for this person to be a body double meant to trick us (and Kenji), then that sucks. First of all because that's cheap, and second of all because Sadakiyo isn't a particularly interesting antagonist. Bullied weird kid who turns evil. Hardly striking, and frankly a little painful to swallow. Not to mention how "Obvious" a suspect he has been for so long. Until proven otherwise though, I'm assuming that Sadakiyo is NOT the friend.