Rosemary was from a wealthy family that lost their position in the demon world.As the only child,she had the responsability to become an amazing student and amazing demon.Due to the many responsabilities she had on her shoulders and Vivi being the best student,she usually wanted Vivi to notice her.Everytime there was the results of a test,she would look at the board in hopes of being in first place and always ended up being second place right after Vivi.When her family told her the news of her being engaged with him,she started to hate him,because of her family needing to depend on his.When he saw her,he said he "Vaguely remember you" and caused her to cry,cause after many years he never noticed her