Romina is Queen Amberly's cousin. She is mentioned by Adele in a letter for Amberly when she was in the Selection competing to marry King Clarkson (who was still a prince) as she hoped that a Two or Three would be in the family to help her adjust, but it turned to be just "farmers and lawbreakers" as Adele put it.
Romina fell in love with a Six who drove the tractor for the Rakes family in Honduragua. She was pregnant from him before they got married, but before the child was born, the Six said that "no child of his is going to become an Eight". So he and Romina got married, while Amberly was in the Selection, which made Romina a Six as well.