regarding luperci anatomy and the ability we have to fudge it to a minor degree, is it okay to have a mixture of different aesthetic interpretations depending on the character, or do you just have to kind of pick one as a player and stick to it? can i have one female character with human-like booba, and then one that is completely flat chested?
You can do what you like between characters. The main thing is to be consistent with regard to individuals, and that consistency should also remain across players.
For example, if Wolf is always described as being flat-chested by their player Bob, other players describing Wolf should stay true to that.
If Bob's other character Coyote is well-endowed, other players should stick with that interpretation where relevant. That said, if player Anne's personal preference is to interpret all Luperci as minimally-humanised and with flat chests, then they can simply refrain from making direct references to Coyote's breasts. They can also choose to interpret what big breasts are intended to "mean," which may be femininity, attractiveness, sexuality, or desirability, and make references based off that. E.g. "Coyote was exquisitely attractive, but Dog resisted staring."
Hopefully, this sort of protocol allows all players to have their own interpretations while still respecting others', sometimes differing, interpretations. :>