So the primary personality has descent-of-consciousness; when I talk about the past, I say "I" when speaking of the primary sets, and "she" when speaking of the tertiary sets. Mona is the weird case.
The former personality sets before the complete merge were as follows, in order of seniority: Joan-prime (primary personality, near-perfect descent-of-consciousness and descent-of-personality from birth), Shanna (tertiary, guardian, wiseass, twisted sense of humor), Mona (secondary, damaged from Shawn/mental attempt to kill her, mute, incredibly shy), AzureLunatic (tertiary, Malkavian, formerly a LARP character, nuts, possessor of the Azzgrin).
However, the tertiary personalities are almost entirely where I get my personality tags from. Shanna and Azure merged (see, I think of AzureLunatic the Malkavian as Azure, and myself as Azz, which is why it boggles me when people refer to
me as Azure except when they're being formal) and I-the-primary-consciousness inherited nearly all of that personality. So if you went back in time and met Joan-prime, you'd see a few things the same, but you'd recognize
me when you met the Shanna/Azure merge. Joan-prime's personality became Marah, with the addition of some of the less-fun goodies from Azure's sets, and some of Mona's damage. (Joy.) Mona and Naomi have very many things in common; Naomi just seems to be without the damage that Mona took.
garnetdagger took over Shanna's guardian functions, and has a
measurably different writing style.
So, yeah.
Descent of consciousness is different than descent of personality. But we probably already knew that. Except for me.