The fucking manic identity issues is something I've never known how to get over. Medication is great, but it's not a magical fix. When you stop having the manic episodes all the time, you're left with no sense of who you are, because you whole sense of being was these emotional, identity outbreaks. Plus sometimes with the stronger antipsychotics, it can make you extremely depressed because you don't feel the emotions you used to. Sometimes you want to stop taking them so you have another manic episode, so you feel ontop of the world and you feel like you have a sense of purpose.
But back to being on medication, because of the depression it can cause and because of the lack of emotions, you don't really know who you're supposed to be. You don't have any interests like you used to (even if the interests were completely erratic and nonsensical) and it can leave you feeling pretty suicidal.
I have no idea what the """magic fix""" is to having a sense of identity when you're schizoaffective and on strong medication. Intensive therapy is all I can think of, which I'm sure she could get with the support of her parents. Maybe going into Intensive Outpatient or Partial Hospitalization so she can build a sense of community, and hopefully find something she likes that way. Maybe she'll make some real friends.
This is just what I go through with schizoaffective and medication, and from the way she's been, I don't doubt she's in a similar boat. I feel bad for her, but I know better than to pozload my negholep. I'm fucking crazy enough, I'm not adding more of it into my life.