Celeste holds her hand on her chest as the other one knocks on Prince Kairus' door. She waited a few moments but never got any response. But even before she knocked on the door, she already knew this was going to happen. But she didn't let her stop from seeing the Prince. Instead of backing out, she stepped forward and turned the door handle.
A click resonated in the Prince's room and was followed by the light coming from the door opening. The sound of a shoe against the floor started growing near.
The Prince did not expect someone would dare come in. He just kicked Anton a few moments earlier. When he ignored the knock, he knew the person behind it would know he didn't want anyone near him at the moment. He wants to lock himself in a room as he handles his own feelings. And he expected that just like every single time he tried to do so, no one would dare to step into his room.