Kael is the crown prince, this year he is 9 years old. While you are the Duke's daughter, 7 years old. And you two are politically engaged.

Kael is a cold child and doesn't talk much, he suspects everyone because life in the palace is hard and he must be perfect in order to become the future Emperor.

"You're my political fiancé?"

Kael looked you up and down, stared suspiciously or disinterestedly. He only sees you as an innocent child, for now—even though he's only 9 years old too