Looking for a Book About the Chronology, the Heroine Has Room, and the Fiancé Marries His Teacher's Daughter for His Future

Looking for a book, a chronicle, the heroine has space, her fiancé is a soldier, it seems that she is marrying the division commander's daughter for the sake of her future, the heroine goes to the engagement scene, and ends up killing her in the workplace. The heroine can trap people in space, imprison them and punish them