Reines El-Melloi Archisorte  

Princess of El-Melloi, ライネス・エルメロイ・アーチゾルテ

El-Melloi IIs younger sister is his adoptive sibling who was given him the name "El-Melloi" and the seat of the Lord by her. She has been instrumental in bringing the family together during their hardships, but sometimes demands unreasonable things from him to see how he responds.