First Look:
Netto is an agent with Indian Intelligence.
I know very little about this individual. I do not even know for certain whether Netto is the operative's first or last name though I would lean heavily on the latter.
What I do know comes from fellow spy-fan Narayan Radhakrishnan who describes this individual as being "quiet and unassuming" and someone who "used more of brain than brawn in tackling sensitive issues, rather like George Smiley [over that of] James Bond".