The First Monarch is a title given to the ruler of the Kriosian Sovereign Dynasty, a government that was known on hundreds of planets in the mid-22nd century.

In 2153, the Kriosian Kaitaama rose to the position of First Monarch, several months after being kidnapped by a group of Retellians. She told Commander Charles Tucker III of the Starfleet ship Enterprise to come visit her on Krios Prime after she had risen to the position, as she intended to issue several reforms concerning the courting of the First Monarch. (ENT: "Precious Cargo")