Madison Ainsley is a murderer, mostly seen wearing yellow, working together with Ann Watkins.
Madison and Ann stalked the Smythe family and eventually tricked Gracie Smythe into letting them inside. Together they'd use a paper fortune teller to see which weapon they ought to use to kill, and eventually Madison arrived at an old man while searching for Gracie and Araceli Gomez. She then stabs this old man to death and goes after Gracie, only to be ambushed and knocked out by Araceli. When she's arrested, she claims that she and Ann were angry at their boring rich neighborhood.