I'll probably get heavy flames for saying this, but I really don't mind. Eriana's story sounds to me completely deus ex machina. It's an impossible story. OK, I get that probably a girl was conceived in different universes at somewhat the same hour of the same day, some time after Lucifer did destroy the Earth in one of them and didn't in the other. Just the chance of this event was staggering low. To call her that name was also improbable, but bearable. In very different situations, parents would give their kids different names, but it could be argued that such name was decided many years before in her mother's head (or her father's).
What's really inconcievable is that it would be exactly the same Eriana with the exact same genes, with the exact same education (read, "brain states"), that is, the same person. This because every fertilized egg is different than any other. So the chance of Eriana being in one universe and in the other is too friggin small to be left as "luck". There's luck and there are miracles. And then there are badly placed deus ex machinas, in "oh well, isn't that lucky, you found your girlfriend here too!! And she loves you!"
Impossibly convenient... Not the only thing that erked me in a beautiful campaign that TBP is, but since people are discussing it, I thought I should say what I thought about it.