the power behind the throne

an individual who posesses great influence over someone who is officially in charge

The idiom "the power behind the throne" originated from the historical context of monarchy and royal courts. It is used to refer to an influential person or group who wields significant influence and control over decision-making, despite not being the public face of authority. All in all, the phrase symbolizes the idea that while a monarch or leader may hold the official position, there are individuals or factions who hold substantial power and shape the course of events behind the scenes.

The prime minister's chief advisor was known as the power behind the throne, as they held immense sway over government policies.
In the corporate world, the board of directors often acts as the power behind the throne, guiding the CEO's decisions and strategies.
The queen relied on her trusted counselor, who was considered the power behind the throne, for guidance and managing affairs of the state.
The political party's influential donors were seen as the power behind the throne, as their financial support influenced policy decisions.
Though the CEO was the public face of the company, the chief operating officer was the real power behind the throne, overseeing day-to-day operations and driving key initiatives.