Evangelos Constantinou

A doctor was among the hospital staff that attended Big Boss during the 1980s, after the latter had awakened from a coma. Upon being informed of Big Boss's recovery, he arrived at his patient's ward and told him to relax, as there was "plenty of time," before telling him something important. The doctor then informed him that he had been out for quite some time, and pre-empted Big Boss's question of how long it had been by answering "nine years."

Behind the scenes
The doctor first appeared in the VGA 2012 trailer, The Phantom Pain, back when it was still advertised as a separate IP game allegedly made by Swedish developer "Moby Dick Studio." He later appeared with the same scene as in the VGA trailer in the GDC 2013 trailer of Metal Gear Solid V: The Phantom Pain, only this time, he also addressed how long the patient (Big Boss) was in a coma.