I know what you mean. Why is she isolated ? I was thinking about giving them two titles - one when with the queen and one when they are not with the queen. or a title dependent on who was speaking to them. If it was a farmer, then they would ha a title showing that they were doing the business of the empire but if it is an aristocrat addressing them it would be more in the capacity of students/advisers to the queen. Just got fond of them having two titles...
But if they have only one title, consider the history of their job. Did it start out when someone close to the queen decided that she should have some help and asked some of the bureaucracy who volunteered. or decided she herself that those positions should be filled and had interviews before deciding who she hired ?
In the end, if the title seems natural in the story, it will work. They could be disciples, student, advisers, suiters, whatever - as long as it becomes natural to call them by their title.
Hope it helps