Okay Group A would definitely fit your theme better imo!
I think you should eliminate group B, just from looking at the group as a whole their appearances don't blend well
I really like the vibe from group B because it reminds me of a Victorian child's toy room.
- Horse - Rocking horse
- Penelope - a doll with a bow
- Pekoe - truly very much like a China doll
Etc. etc. It looks like a toy box with many toys.
The mayor could be a doll herself! Or is she the child playing with all these toys come to life?
A very exciting theme indeed!