Billy Milligan is the core personality.
Arthur is an extremely sophisticated and educated Englishman.
Ragen Vadascovinich is the "keeper of hate".
Allen is a con man and a manipulator.
Tommy is the escape artist; he is often confused with Allen.
Danny is afraid of people, especially men.
David, age eight, is the "keeper of pain".
Christene, age three, was the one who would stand in the corner in school when "Billy" would get in trouble.
Christopher, Christene's brother, plays the harmonica and drums.
Adalana, a lesbian, cooks and cleans house for the others, and writes poetry.
