Veronica was rather good at croquet, as she tends to play it by herself a lot. She was happy to converse with anyone there, and she looked very excited, although Veronica never spoke too loudly (as is her usual way). She was very attentive to her little brother and especially proper around Gaius Travers. It might have looked as though she were trying to avoid him for a short while, but after she taught him croquet she seemed more normal.
Veronica probably asked ladies such as Jacqueline, Julianne, and Astra to play the piano for the group once they went inside.