Mephistopheles is fallen angel and He is a substitute for Azazeal to take care of Malachi.Ella and Malachi romance one another magically and otherwise, and their respective mentors, the Archangel Raphael and the demon Mephistopheles, both use psychological tactics to get them to do as they wish. Ella and Malachi eventually have sex, as the evil side had wanted, and by fulfilling Ella's true desire (to be normal), she is made a slave to Malachi – his succubus. Ella after Malachi sends a fallen Archangel, Sariel, to attack him. Mephistopheles betrays the cause of evil by helping Ella save Leon, who he feels did not need to die, and is subsequently punished and has his eyes removed. Raphael falls from grace by trying to rape Ella, who announces at this point that she no longer works for Raphael's master, God, and is a freelance agent at last.Rejected by Hell, Mephistopheles convinces Leon to return, where he saves Ella by cauterizing her wound.