Once a friend of mine mentioned about a friend of his named Dick Hammer (actual name, not a nickname). I laughed for so long and he didn't understand why until I explained. Then he was surprised and somewhat horrified because it never crossed his mind.
Actually, she was. Deception starts well before words are exchanged. To people in a place like this, adventurers are far more trustworthy than the imperial knights. She showed up in the disguise of an adventurer to play on that favor instead of showing up as a knight, where they would be appropriately (and fairly) suspicious of her. Proving that they should have been.