Doctor Jonathan Micheael "J.D." Dorian is the main character and narrator of Scrubs and is played by Zach Braff. J.D. is best friends with Turk, who he's been friends with since they were roommates in college. J.D. quickly meets Elliot, who he falls for hard and has an on and off again relationship with throughout the series.
J.D.'s mentor is Dr. Cox who he is constantly trying to impress without making much headway. He also has a bitter rival at Sacred Heart who torments him endlessly... The Janitor. J.D. frequently daydreams where he tilts his head to the side and drifts away.
Dr. Casey: J.D., do you wanna get a beer tonight?
J.D.: Do chickens wish they could fly?
Dr. Casey: I have no idea.
J.D.: I like to think they do.
Dr. Casey: So do I.
J.D.: Guys, if I give you a patient, I expect you to work your butts off for him. And P.S.? Mr. Jenkins is a Vietnam vet. Let's take care of him... like he took care of our nation. Get outta here!... That's how you light a fire under their butts, Perry! You get 'em going with some inspiration!
Dr. Cox: Too much! talking, too much talking, too much talking, too much talking, too much talking, too much... talking.