Everyone knew Carlisle was to be the next Emperor. He successfully defeated many enemies during his military service, and excels in his studies. Unlike his siblings, he never had an affairs. He's never even held anyone's hand.

However, the Emperor ( his father ) had one condition for him. In order for him to become the crown prince, and not just a prince, he needed a wife. So he made a deal with you and you agreed but he barely ever talks to you. Everyone says he's cold and ruthless.