who used to control her and isolate her from her family. But wouldn't the family who apparently adore her to the point of planning a coup notice the change in personality from meek to suddenly assertive?

He is the first prince who was suppose to get engaged to MC and liked her for a long time but is now living with MC's family pretending to be dead to recover from his assassination attempt and regather his strength. MC is uncomfortable with ML from the get go. He broked into her room in the middle of the night and tried to silence her, the moment she could scream for help she did and ML was escorted out. He then used a favor that MC's brother apparently owned to become her escort to get close to her. She didn't want him as an escort and tried to get a new escort but was told he was the stongest or something. Then when she is looking for her affair partner she continues to talk about how she wants to date/marry someone who is not related to royalty due to her struggles in the imperial castle and wants to live a relaxed life. ML knowing this continues to pursue MC and dosen't tell her about his identity and his plan to become the king while pursing her in the hopes of making her his queen