It gives no hint that the story is a superhero one. Some that it's steampunk, but no superhero.
Which is a bit complicated, since superheroes are not any of the main characters, though a few become plot significant.
Perhaps there will be a newspaper in the room. And she will notice an article on one. Perhaps on the death of a man speculated to be a certain superhero -- which she will know is true. That would have the advantage of foreshadowing the danger of certain powers. And introduce the heroes in a suitable understated way so you don't overestimate their importance.
But -- I still gotta slither it into the story with what she's really thinking about, their arrival, and what she thinks of their circus.
