The other is an anoymous 'Guest' who identifies themselves on each review using a different set of letters and numbers. This person leaves 'reviews' that are also basically letters and numbers... These are the last 8 I've got:
Veri n1c3GNTst0rig6
Veri n1c31Zcst0rijy
Veri n1c3fIzst0riwN
Veri n1c30NHst0riH8
Veri n1c3Wkvst0riHK
Veri n1c3raBst0riS4
Veri n1c3AELst0rixA
Veri n1c3frLst0ri32
By cunning deciphering, I've decided they're basically saying 'Very nice story', and as the reviews are more spread out and restricted to a single fandom, this person COULD actually be reading the stories, but if so why leave such random reviews?
Honestly, I'm starting to doubt the sanity of some of the people using ff.net. Both these spammers have more than a few screws loose.