Lily is the Wrath Soul that resides within Daisy, who is a human-looking robot that has a normal kid's life.  Daisy is innocent and friendly to people, while Lily is very protective over her, to the point where Lily states that her primary directive is to protect Daisy at all costs.  Instead of saying "yes" and "no", Lily responds with "affirmative" and "negative", much like any other robot.  She also talks in robotic phrases/sentences, and never speaks like a normal person.