Doctor is the amnesiac protagonist and tactical commander of Arknights. Waking up with no memory of their past, they become the central strategist for Rhodes Island, guiding Operators through dangerous missions against infected threats, hostile factions, and political conflicts. Though physically weak and often hidden behind a mask, Doctor is renowned for exceptional battlefield planning, logistics, and decision-making. Their role in the story is to lead the organization’s operations while slowly uncovering the truth about their identity and the world of Terra.