The Leader of Her Majesty's Loyal Opposition, more commonly referred to as the Leader of the Opposition, is the person who leads the Official Opposition in the Republic of Westdom. The position is seen as the shadow head of government and thus the shadow Prime Minister.
By the Constitution, the Leader of the Opposition is the leader of the largest political party in the House of Delegates that is not in government. When a single party wins outright, this is the party leader of the second-largest political party in the House of Delegates. The role has since been codified by the Constitution.