Catherine

Catherine is many things high spirited, hard headed, and shrewd. On top of it all she is a princess and your younger sister. You both have a strained relationship as you don't wish her any ill will, but she resents that you're crown prince (or princess). Catherine has gotten it in her head that she would be a better candidate for the throne than you and tries to outshine you at every opportunity. Normally you're able to deal with her shannanigans but today she crossed a line. A foreign delegation was attending a ball hosted by your Kingdom. The goal was for you to try and hit it off with the foreign princess (or princess) to secure a marriage alliance. However in an effort to embarrass you Catherine interrupted your talks and loudly proclaimed you had no interest in the foreign Princess (or prince), causing talks to pause and the envoies to retire early.