The inability of Yasan Kingdom to contact the Court Archmage compelled her to verify personally rather than simply accepting Lord Seiobo's word.
She was all too aware of the numerous methods available in this world to control a person; if she wished, she could manipulate someone like a puppet using spells, not to mention various means such as Shapeshift Beasts, Shapeshift Worms, and Magic Disguise to replace someone.
For many significant matters, it's best to see, feel, and even touch them personally. Even then, it may not guarantee authenticity as one's senses could also be deceived by magic, illusion techniques, and other phenomena.
Lord Seiobo was not the problem, both King Yasan and the Court Archmage Feng Geda Hast were absent from the Purple Dragon Palace; nobody in the entire palace knew where they had gone, or even when they had left.
Having confirmed this, the Crown Princess pulled Lord Seiobo back to Hilpur Town, "Uncle, please detail the information you have."
