If Naoto had been trying to derail Yousuke's current train of thought, then she'd succeeded spectacularly. He went visibly pale, flashlight falling from his hand. He bent down quickly to scoop it up, trying to think up any way possible to cover for his obvious distress. If Naoto thought it would be okay to bring Adachi to meet with them, then she couldn't know that he was the murderer either. So much for the slight hope that they'd be able to work together on this.

"Y-you want to bring him here?? Are we supposed to just tell him about, you know, everything?" Remember, Yousuke, this is Faildachi we're talking about now. She doesn't know him as anything else. Just Doujima-san's blundering, big mouthed partner. She's going to think he's perfectly harmless, damn it all. "I mean... isn't that a little risky?"