Yang Yi was using retreat as a strategy to advance, revealing the fact that the Grey-cloaked People he had sent were either dead or wounded, while he and the members of the Organization of Water remained unscathed.
You cannot suspect me of being an insider just because my men are formidable and we suffered no casualties; that's the point Yang Yi wanted to express.
Aaron was somewhat annoyed, he whispered: "Listen, no one is accusing you, and no one suspects you're a mole!"
Yang Yi retorted unwaveringly: "Then how do you explain the fact that the first thing everyone does after meeting me is to demand I hand over the item?"
