I totally LOL'd at the part when Shion and Mion revealed they were only faking to be 'Demons/Zombies' all along. Not because it was sly of them... but because its just a total resemblance of something they share.
I also laughed at Rena's cruel display of 'innocent manipulation' towards Keiichi. She pwned him. Hard. (Literally ^_^;; )