Andrew "Andy" Collins

Usually called "Dr. Andy." He poses as Luna's father, and at first dislikes working with Control. Unlike Control, he is very concerned about Luna's emotional health, and often gives Luna social advice that Control is unable to provide. In the 4th book, he quits over Control's pushing him to make Luna Okay with killing, but he decides to stay for Luna's sake and due to Control threatening his safety once he leaves. His feelings for Control have been confirmed in the 6th book.