Would "Eu a sei" work here?
Hmmm.. that would sound too awkward in such a simple sentence without a context...
You do not usually use "saber" related to people.
"Eu conheço ela" is more commonly heard in Brazil, correct?
Yes, thats true. But the most correct and formal would be "eu a conheço"
no, never. know as in "saber" is for things, only, never for people.
Is "eu conheço-la" possible here?
I think it would be "eu conheço-a"