Responses

her ambition could also be for the sake of her territory, Plus Ars is well know about his contributions to his territory so she just might want to have his talents in her arsenal just like Ars does when he sees talented people. I don't think she is a bad person, Going by her skills there is probably some things she can't do right now without Ars's help
I gotta say, everyone seems to have an issue with the fiancee, but I think she is just what he needs. He has an all-rounder with Ritsu, a mage with Charlotte, and a great strategist with Rosel, what he lacks is someone who is a political powerhouse, and a legal powerhouse. His fiancee covers at least one of those skills in spades. Her ambition is worrisome, I still think she possess a skill set that he needs.