X is the main protagonist of the Rockman X series, which is also known as Mega Man X in English-speaking regions. He is an advanced robot called a Reploid, created by Dr. Thomas Light. X possesses human-like intelligence and emotions, allowing him to make independent decisions. He fights to protect humans and other Reploids from the threat of Maverick Reploids who have turned rogue. Throughout the series, X struggles with the moral dilemmas of his battles, often questioning the nature of conflict and the cost of peace.