.... Yep. Unity's definitely dead and, as Death says, about to start her
afterlife which, for her, should be a doddle presuming she still has vestiges of her auditor life so she's able to handle disincarnation very easily... Or maybe ghosting isn't for her and she'll have a go at reincarnation?
Bringing us to another interesting aspect, since
we don't see any other auditor getting met by Death (and surely, as they are his ultimate enemies, he would have been
very busy with all of them before Unity arrived in the desert). Does this mean that the other auditors, not having been incarnate for too long, and not having learned anything about living, therefore haven't developed the very thing (supposedly) that they may have actually understood about human physicality - the soul or spirit?
In turn, does that mean that the auditors are in fact souls in their natural state and so cannot be taken by death as they're still the same entities merely clothed in hastily assembled flesh? Unity, having tried very hard to immerse herself into being human (and not having any other auditor around to infuriate or fight with her) has had the time to 'get' what's being human means. That's done in a limited way since she's picking up on all the sensate positives and so has investigated the aspects that appeal to her most, becoming a kind of analytical aesthete (instead of an analytical psychopath) and is impressed and wanting to know more so she
does acquire a human-like soul that Death can take...