Following her father's conquering footstep,Mariemeiya with her own set of armies known as Mariemieya Forces,captured Queen Relena during her diplomatic visit to the colony X-18999 at Lagrange point 3.She was hiding under the name Mariemeiya Barton to convince everyone that she's the heir to the Barton Foundation.Much to everyone's surprise what a sweet and innocent looking but sinister 7-year old child could do.