The position of Minister of the Department of Care of Magical Creatures, with its power being significant or negligible depending on how one sees it, was suddenly appointed just before the Queen's death, clearly intended to play a role in stabilizing the government.
Put simply, it was to prevent a new monarch from being too whimsical, hence the remarkably talented Aiwass was chosen for checks and balances, as well as support.
According to the political theories Andre had learned from Star Antimony, Isabel, as the new monarch, would definitely try to wrest control of discourse from Aiwass, who represented Queen Sofia's trusted aide.
Even if Aiwass was actually helping her, she had to suppress him, otherwise her authority would be clearly lower than that of Aiwass, who had the endorsement of two queens.
For a monarch, this was unacceptable.
