Responses
You're right btw lol
Even I thought about this... I think the reason he told her to endure it is for him to go back and rectify the problem and then free her. The crown Prince is more like a protective figure. I WAITING FOR THE DAY SHE AND HER DAD UNDERSTAND EACH OTHER （￣へ￣）
seeing how much the father cares for her I think originally when he sent her to the dungeon or whatever and gave her the knife I think he gave that to protect herself and probably told the crown prince to rescue her just a guess.