Acen was raised by her fiancé since she was a child. Knowledge of etiquette, understanding of people and things were all taught by that man himself. For Aten, that man was like a father and a brother, so when the man's body appeared in front of her separately, she went completely crazy. In order to meet that person's afterlife and have enough power to protect him, she is the most diligent among all the disciples.
But all this is just a chess game set by that person based on time.
The man's fox eyes were full of sadness: "You are the most important chess piece in the game I have planned."