Suffering from dissociative identity disorder, Mary Walker has two other abnormal personalities in addition to her seemingly healthy one. Her "Mary" personality is a timid, quiet, pacifist; her "Typhoid" personality is adventurous, lustful, and violent; and her "Bloody Mary" persona is brutal, sadistic, and hates all men. Mary once claimed that there was a fourth personality, who is 'lost,' but it has not since been mentioned. Aside from highly developed martial arts skills, Walker also possesses telekinetic powers and, more dangerously, pyrokinesis, the ability to set people or objects in her immediate vicinity aflame.