Markus Wolf

Markus Johannes Wolf, also known as Mischa, was head of the Main Directorate for Reconnaissance, the foreign intelligence division of East Germany's Ministry for State Security. He was the Stasi's number two for 34 years, which spanned most of the Cold War. He is often regarded as one of the most well known spymasters during the Cold War. In the West he was known as "the man without a face" due to his elusiveness.

Source: Wikipedia