[she thinks privately that since they don't look a thing alike, this disturbingly human-shaped droid must be using the word 'counterpart' more like 'companion'. The thought of them being capable of something like friendship is just too much, and she quickly tries to stop thinking about it]
Er. Very well. I am Magos Tayber, C-3PO.
[well, she's already started speaking to it; may as well plow right ahead with conversation.]
You're far more... well-spoken than I'd have imagined a 'counterpart' to that little construct would be.