There is (sometimes) an implication that the thing/person that turned up was missing/hidden/etc.
"I hunted for my hat for days. It finally turned up on the workbench in the garage."
In your example - there is an implication that there is a FAKE Dona Lucia already there - and the 'real' one is likely to turn up (or arrive) at some point in the future - at which point the FAKE will be found out to be FAKE.
Not a teacher, 53-year-old American.
… and that’s my opinion