[Alastor]

I thought that samurai ghost thingy was alays around in night 4? Eh, I forgot.

Also, Kirie is deadliest because she kills you upon touch, so you can't argue against that.

And I'm not talking about the challenge, I think you're just missing my point... my point is that everything revolving the story, including the atmosphere during gameplay, makes Kirie kind of scary to fight.

I can play the game without being scared at all, but that's if I choose to remain outside the 4th wall, but if I let the game take me into its world...

I doubt Reika is more difficult. I played Project Zero 2 and 3 and stopped playing because they weren't quite as scary, and I was too good with the camera (i.e. whenever a ghost came at me, I just said cheese and tried to get the best score, rather than feeling the urge to just exorcise it).