They honestly should have had Mai Nakahara voice her while channeling Rena, it would be up to the levels of Usoda! awesomeness.
I am seriously having a blast with the mysteries right now. I actually had the same exact conclusion Battler had with Kinzo's room, but now It's the true classic case of the locked room with Eva and Hideyoshi's room and I'm stumped as it is. I was refusing to admit a magical reason for the first 2 issues due to very plausible logic, but it seems I have to admit it now for 3rd issue.
Anyway, the scene with Kanon in the boiler room is some of scariest shit I've had to contend with in a while.
At this point for me it all points to a magical perpetrator rather than a human one... Almost done with Episode 1.