In most situations, a king or queen making a formal public appearance would have someone there to announce or "introduce" them. But what happens if a ruling monarch found themselves without anyone to act as herald, and needed to formally introduce themselves? (Note: this question is not specific to the British monarchy; I'm asking if in any monarchy situation, there is a known precedent or procedure for this.)
Would, for example, Queen Elizabeth introduce herself as "I am Her Royal Majesty* Elizabeth II, by the Grace of God, of Great Britain, Ireland and the British Dominions beyond the Seas Queen, Defender of the Faith"?
Or is there some other convention for monarchs introducing themselves? Does it depend on the situation, such as who they're making introductions to (e.g., heads of state vs common folk, etc)?
Alternately, is it assumed that the ruling monarch will never need to introduce themselves, and therefore no monarchy has a precedent or procedure for it?
*("Her Royal Majesty" sounds strange here, because by strict grammar conventions it should be "My Royal Majesty", but that sounds even weirder.)