As revealed by Frederic Barnes to Asbel during the "Lineage and Legacies" arc, Kerri is the youngest daughter of a Baronian noble. 20 years prior to the events of the story, her older sisters married nobles from Barona and Gralesyde, while Kerri was sent to marry Aston Lhant, the local Lord of the town of Lhant. At first, the two did not get along well, as Kerri did not want to be married, and Aston tricked her by switching places with Frederic. This was due to Aston wanting to find out what kind of person Kerri was. Kerri was angered by the deception and decided to return to Barona, but before she could do this, Aston left Lhant to protect Richard's father, King Ferdinand IV, from an attack by the Fendelian army.