Dr. Horatio Quentin Quack was a Mobian Duck who, following in his late father's footsteps, became a doctor. A personal friend of King Maximillian Acorn, Horatio was appointed Royal Physician, and remained close to the House of Acorn even after Dr. Ivo Robotnik's military coup and disappearances of most of the Royal Family. During his time with the Knothole Freedom Fighters (led by Sally Acorn, whom Horatio had delivered and thus considered a favorite), Horatio served on the frontlines, until Max's return, where his time was preoccupied with taking care of him and the rest of the population of the restored Kingdom of Acorn. When all-out-war was declared between the Kingdom of Knothole and the Eggman Empire (led by the late Robotnik's alternate universe double Dr. Eggman), Horatio lost an eye in an explosion caused when he accidentally stepped on a land-mine while tending to the wounded in battle. Since then, he has given up active frontline duty and now serves as Head Doctor of New Mobotropolis's Tommy Turtle Memorial Hospital.