Holly Mad-thane is the nine-year-old daughter of Duke and Lady Mad-thane. She asks Claus and Lavie to deliver her message (in addition to her mother's) to her father, who she fears will not return home from the battle at Minagith. After her message is broadcast aboard the Claimh Solais by Claus and Lavie, her father decides to hide his shame and retreat from the losing battle. Although Holly "used to always cry", her personality grows stronger by the end of the series.

Spoiler

She is one of the children taken by Exile to the new world.

(Source: Wikipedia)