Introduction:
Dr. Sadao Hoki is a prominent character in the short story "The Enemy" written by Pearl S. Buck. He is a Japanese surgeon who studied medicine in America and is highly skilled in his profession. Dr. Sadao is known for his intelligence, compassion, and dedication to his work.

Appearance and Background:
Dr. Sadao is described as a middle-aged man with a strong build and a serious demeanor. He has a neat appearance, with short black hair and a well-groomed mustache. As a Japanese national, he is proud of his heritage but has an inclination towards Western culture due to his education in the United States.

Intelligence and Professionalism:
Dr. Sadao demonstrates exceptional intelligence and professionalism throughout the story. His surgical skills are highly regarded, and he is considered one of the best doctors in Japan. He is meticulous in his work and pays great attention to detail, ensuring the best possible outcomes for his patients. Dr. Sadao's dedication to his profession is evident in his continuous pursuit of knowledge and his commitment to staying updated with the latest medical advancements.

Compassion and Empathy:
Despite his stern exterior, Dr. Sadao possesses a compassionate and empathetic nature. He feels a deep sense of responsibility towards his patients and is genuinely concerned about their well-being. When he discovers an injured enemy soldier, an American, washed ashore near his house, he chooses to save his life, despite the risks involved. Dr. Sadao's compassion is also evident in his interactions with his wife, Hana, as he tries to alleviate her fears and assures her of their safety while harboring the soldier.

Conflicting Loyalties:
Dr. Sadao finds himself torn between his loyalty towards his country and his duty as a doctor. He is conflicted about whether to turn the enemy soldier over to the authorities or protect him. This internal struggle highlights his moral dilemma and the complexity of the situation he finds himself in.

Determination and Courage:
Dr. Sadao displays immense determination and courage in protecting the enemy soldier. Despite the potential consequences, he stands firm in his decision, risking his reputation, career, and even his life. His bravery is evident as he devises plans to keep the soldier hidden and nurses him back to health, all while ensuring the secrecy of their actions.

Conclusion:
Dr. Sadao is a multi-dimensional character in "The Enemy." He embodies intelligence, professionalism, compassion, and empathy. His conflicting loyalties and the moral dilemma he faces add depth to his character. Dr. Sadao's determination and courage in protecting the enemy soldier demonstrate his unwavering commitment to his principles and the lengths he is willing to go for what he believes is right.