Derek Stiles

Derek Stiles is a protagonist of the Trauma Center series. He's a genius surgeon who eventually joined Caduceus, an organization under the jurisdiction of the World Health Organization. Despite being somewhat bumbling in nature he is a highly skilled surgeon, who was at the forefront of the battle against the man-made disease, GUILT. He has a supernatural power called "The Healing Touch" hat is harbored by a very select few doctor. His version allows him to slow down time momentarily, although it takes so much out of him he can only perform it once per surgery, and at the risk of fainting.

By the time of Under the Knife 2, he has become a rather famous figure, known for having the ability to pull off seemingly impossible surgeries with his lightning fast reflexes. Him and his nurse assistant, Angela Thompson, have a heavily implied romantic relationship by the end of the game.