 The entire novel is about her gaining revenge on Nicodemus for betraying and then leaving Accords that she drafted.She forces Harry to work with his archenemy by artfully removing all his other options ahead of time; has Nicodemus "come to her" to gain Harry's services in paying off an old debt; and gives Nicodemus the very idea of breaking into the vault of Hades just so he will murder his own daughter to do so, whilst convincing Marcone to set up the Vault for Nicodemus to break into specifically to make the link into Hades' vault to enact his own vengeance for his torture at Nicodemus' hands ... and Hades to go along with it by being Marcone's first depositor.Furthermore, the idea that Nicodemus' daughter would not be judged by Heaven and so be free of punishment is completely voided by the fact that Hades takes his role as judge of the dead very seriously, indeed.