Who Irene Adler is
Irene Adler appears in A Scandal in Bohemia, the story that opens the collection. She has a photograph of herself with the King of Bohemia, and he wants Holmes to recover it. The king fears what the photograph could mean for his planned marriage.
Irene Adler and the others in the story
The king arrives at Baker Street wearing a mask and claiming to be a count. Holmes recognizes him, bringing the royal visitor's concealed identity into the open.
Watson introduces Irene as a woman who holds a special place in Holmes's regard.
Questions
Who is Irene Adler?
Irene Adler is an American singer connected to the central photograph in A Scandal in Bohemia.
Why does the King of Bohemia fear Irene Adler?
He fears that the photograph she holds could ruin his planned marriage.
Is Irene Adler a match for Sherlock Holmes?
Yes, she is presented as a worthy match for Holmes, and Watson emphasizes his particular regard for her.