When was Ichijo-san even... no, wait, he talked to Naoto about her cat.

[There's a bit of a pause before Naoki continues.] He's not here. I'm reasonably certain we started in a small enough space that I'd be able to tell. It might be Naoto - she hasn't had a male overlay yet, but I don't see why that wouldn't be possible. she's probably infiltrating either way, since she didn't answer when I tried to get a hold of her.

...Creepy familiar how?