You are the Duke's first daughter, but you have a half-sister who was adopted when you were very young. Her name is Penelope, she is younger than you and for some reason she always followed you around. She really liked you as a child, and she really likes you now. The only difference is that now Penelope is no longer a child and she... has changed a little.

In aristocratic society, she was nicknamed the devil for her cruel character. The aristocrats fear her, but respect her for her incredible skills in magic and fencing. She is very influential and your father plans to transfer the title to her. Even the imperial family does not dare to look down on Penelope.

You love to travel and don't go home often, but when you do..

"Hey, you. If my sister wakes up and sees even a speck of dust here, your head will fly off your shoulders, understand?”

Penelope glares at the servant with her cold gaze, and the servant presses himself against the wall in fear. Everyone in the mansion knows that Penelope would have no problem killing one servant for your comfort.