Evangelos Constantinou

A doctor was part of a British-owned hospital's staff during the 1980s. Upon being informed of Big Boss awakening from his nine year coma, he arrived at Big Boss'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 was out for quite some time, and answered Big Boss before the latter could ask about how long he was out. It is unknown what his fate was during the attack on the Hospital.

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