Claudia von Riegan was born the second daughter of an unidentified Duke of House Riegan. According to the "Letter to a Mysterious Noble" in the Shadow Library of Abyss, Claudia was in love with the heir to House Daphnel, which was in the midst of an inheritance feud. The head of House Daphnel had two sons, and chose the son with a Minor Crest of Daphnel to become his heir, angering the other son, who had a Major Crest. The son with the Major Crest planned to take half of House Daphnel's territory and join the Holy Kingdom of Faerghus, and made innumerable offers to Claudia for her hand in marriage. Claudia considered the son with the Major Crest to be repugnant, and wrote to the Daphnel heir insisting that if he did not come to marry her, she would leave Derdriu and come to him so that they could wed under the Garland Moon.