Tailtiu appears as a rather bright and bubbly girl with no wish to mingle with complicated politics, especially if they involve her father. She developed a crush on Claud prior to her introduction and claims to be his bodyguard. However, after Reptor turns hostile against Sigurd's army, Tailtiu begins to display her true personality, one which is of a concerned and insecure nature, as she fears that her relationship with Reptor will strain her bonds with her allies. Tailtiu is a descendant of the crusader Thrud, the middle child of Friege's Duke Reptor, and the mother of Arthur and Tine.