She did hit Assassin with her auto hit technique. He'll probably be suspicious about that but that's for another time. He'll probably either chalk it up to some sort of servant skill, which it is, or that archer got in a shot he didn't notice somehow. Archer won't think of it more but assassin isn't the type of man to leave things up to chance. He'll lose all memory of the battle but he will start pondering things a little more. Not that it matters since he'll just forget next time he fights Jack.