Eh Im on the emperor side. As an individual, that was quite an err to pry into her previous life, like your current BF asking what kind of things you done on bed with your ex. With his duties as the emperor though, someone linked with an organization that killed a neighboring king is a threat to his governance and more so when that someone thought prioritizing her involvement with the organization is a wiser move than threatening the emperor with vicinity of his shadows. For a master class assassin gRim reAPer, she sure cant keep her emotions in check.