Okay so Faye was wishy-washy in IC, but for full transparency:

Faye is going North (Route 1) after exploring the city. She is open to travelling with any number of people. 

IC she's only put that out there to Nils and David (and anyone that decides they were near the three of them) but she won't turn down random requests.

So who is interested in a bit of sightseeing, event triggering, and catching Pokemon around Grand Glory with her? There's some monuments she wants to photograph while in town then off to the trainer park.