Jennifer Taggart and Alice Raikes aren't "real" but I'm them whenever I'm writing or thinking or dreaming about them.
@gwynnion isn't "real" even though you're reading her post right now. She's a version of me with a particular filter on.
There's a "real" me with a driver's license and social security number and a credit score. But she doesn't feel real either. In fact, she usually feels like someone other than what people see. She wishes she was someone else.