As much as I love swanthief/fire, there really seems to be enough issues that can add tension and drama without doing the ‘other woman’, love triangle route. Let’s be honest: it’s lazy storytelling at this point to choose that route.
Ramblings of mine that most probably won’t care about! 😀 I'm thinking Manhattan is going to reveal a prophecy about Baelfire, possibly rooted in the upcoming 'final battle'. This person, IMHO, seems to be watching the exchange in the coffee shop behind them and run into Neal on purpose. Maybe she's trailing him? Because of his role in the future war? My pet theory right now is that this character is Tinkerbell (and/or a fairy) sent by Blue to find Bae. Blue knew Bae's name when they meet (knew about a possible prophecy too?) and I'm still hoping that Blue's been a couple steps ahead of everyone and been setting the story into action over the centuries spanned.