Dr. Boyer is a surgeon at Eisler Memorial Hospital. He and another doctor were to join Tenma for Mayor Roedecker's surgery. After Tenma operates on Johan Liebert instead, Dr. Boyer scolds Tenma for inadvertently causing Roedecker's death and stated that the doctors had to scramble to cover for him at the last minute. Because of this, Director Udo Heinemann appoints Dr. Boyer to be the new Head of Neurosurgery.