I feel like Leia has a lot of feels about fashion xD she likes her practical, suitable for battle gear, but I kinda get the feeling she also enjoys a nice, pretty/regal outfit when appropriate! So she would be very likely to come to Janet! I bet they could totally get along.
I don't know much about Dr Who, but I kinda get the vibe I'd love Rose where I've seen hey played, they could definitely bond over space travel!
Leia has 'Caf' in her galaxy, and I feel like we can say coffee is slightly different and she can be introduced to it, and probably love it also. I mean coffee can be made all fancy ways too! She's been living off crappy military caf xD.