British monarchy

You can't see me!

_{This character has no official visual representation in any Transformers product or media... yet, at least.}

As leader of the people of the United Kingdom, the Queen of England has occasionally found herself involved in the Transformers' conflict on Earth.

Fiction

Shattered Glass

In the Primax -408.24 Epsilon universal stream, the British planned to invade the United States of America, though the Queen argued against bombing the very land she wished to conquer. Eye in the Sky

Wings Universe

When Clench's Decepticon Syndicate attempted to kidnap and ransom the Queen of England, UK citizen Pyro Ignatius Spark gathered his own team of Second Generation Autobots to rescue Her Majesty. Pyro was subsequently knighted by the Queen for this brave act. Clench's profile

The Last Knight film

Plot details for Transformers: The Last Knight (film) follow. Spoilers have expired, you may remove this tag

Both Queen Victoria and Elizabeth II were members of the Order of the Witwiccans, a secret society who knew of the presence of Transformers on Earth and worked to keep their secret. Portraits of both queens were included in Edmund Burton's collection of Witwiccan/Cybertronian artifacts. The Last Knight

Notes

• The term "Queen of England" is often used erroneously to refer to the Queen of the United Kingdom, as Wikipedia explains.
• The thinking by James Roberts is that by Nominus Prime’s time, the Primes had become like the Queen: a constitutional leader but with the government having more of the power.