Hm. The big secret about Haruhi... could be that she was definitely of some other relationship to her Kyon before the Biomod(s) and the quirks afterwards result in the group social dynamic mimicking the SOS-dan of the novels.
Anything that might require secrecy to Haruhi herself probably means that Haruhi's is the most radical end result from the starting person, enough that there was a psychotic break or something right after she woke up: "That's not me, that's Haruhi... but she's in the mirror, so that is me, I'm Haruhi? Kyon! You lazy good-for-nothing! That's a penalty, leaving your fearless leader in a strange apartment!"
''We don't just borrow words; on occasion, English has pursued other languages down alleyways to beat
them unconscious and rifle their pockets for new vocabulary.''
-- James Nicoll
Anything that might require secrecy to Haruhi herself probably means that Haruhi's is the most radical end result from the starting person, enough that there was a psychotic break or something right after she woke up: "That's not me, that's Haruhi... but she's in the mirror, so that is me, I'm Haruhi? Kyon! You lazy good-for-nothing! That's a penalty, leaving your fearless leader in a strange apartment!"
''We don't just borrow words; on occasion, English has pursued other languages down alleyways to beat
them unconscious and rifle their pockets for new vocabulary.''
-- James Nicoll