He is 37 years old and single
He is wearing a black suit jacket and black shirt with a black belt with a golden buckle.
He is also a strict person and the chief of medicine at Edenbrook Hospital. 
Ethan is a strict and demanding attending physician.
He is also shown to be a man of his principles, believing that lower income patients deserve the same level of care as high profile patients. Despite his harshness, he has excellent bedside manner and cares more about his patients than his own job.