Angelique (once the spirit of the latter was cast out from Julia, or was it Maggie--I can't recall).
Oops, I forgot to address this.
In the beginning of the last ep of the series, Angelique jumped from Julia to Maggie - and Angelique remained in Maggie right up to the final scene. But what's interesting is something that I posted back when we did our first slideshow for the '91 series:
Not that this has anything to do with what was restored by MPI for the '91 Series' finale VHS, but there was more shot for that ep than appears in the restored footage. As the following capture from behind the scenes footage that was shot by a long gone entertainment program named Preview shows, Carolyn/Barbara Blackburn did indeed shoot material for the ep even though none of it was included in either the NBC or MPI versions:
But what's really worth noting when it comes to that capture is that Maggie, who was possessed by Angelique, was supposed to suddenly scream "NO!" at some point after Victoria reappeared and then Maggie was supposed to collapse in Roger's arms. And, of course, none of that is in either version of the ep.
So, the original intent may have been for Angelique to leave Maggie's body after her plans to destroy the Collins family were defeated by Vicki's return to the present. But as things play in the final ep, so far as the audience is aware, Angelique is very much still in Maggie. Perhaps Maggie would have collapsed and Angelique might have left her in the first scene of the first ep of a second season - but we'll probably never know what the thinking was behind not including Maggie's collapse in the final ep...