According to the words of Sebastian Blythe, which allegedly stem from his pure candour, Cosette Barbier is an abominable being. Given their blind admiration, his peers cease to doubt him on such matter. Meanwhile, she ceases to contribute any defence. For, she knows that it drives him mental. His subconscious failure of being utterly predictable amuses her. Thus, in Cosette's regard, it is a fair trade.