Update: I went with this friend to the Pet Expo yesterday, hadn't seen her since last summer. The puppy is now a teenager, and all is not well. The puppy does not get along with the two resident dogs (a rescue Lab mix, 11 years old, and a rescue SomethingDoodle, 6 years old, both neutered males) and they will not play with her, and her play style sounds entirely inappropriate for them. Consequently, the puppy is separated from Charlie and Boston much of the time.
My friend was absolutely not equipped to get a high-energy puppy. She and her husband are in their late 60s and all their past and current dogs have been pretty much just yard dogs, occasionally walked around the neighborhood but not even that in recent years. This Doodle puppy needs way more than that, and she's not getting it. My friend has zero interest in dog sports or any form of training; she's always claimed to 'train' her dogs herself, and we have differing definitions of that word. Someone with training chops could integrate this puppy with the resident dogs with a pretty good chance of success, but my friend is not that person.
The puppy is a very nice girl and my friend loves her and has considered rehoming her but the odds right now are much against that. My friend will simply wait for Lucy to grow up and get through puppyhood. Perhaps then the boys -- or boy, since Boston's littermate died last year and Boston is probably a short-timer, he's a very large dog with many health problems -- will have a better relationship with her.
All of this was entirely predictable, and that makes it really sad. My friend is disgruntled at not getting the dog she wanted; she is now down on breeders and says she will only get rescue dogs in the future. Yeah. Good plan.