I learned that if a person has 7 different personalities and he is naming them in an interview and you are typing the interview for your (lovely) job and he calls them proper names like Sam, you capitalize those; however, if he calls them things like "the carrier" you don't. Good to know, I guess. I would think that a name for a personality would always be capitalized, but I guess that is not the rule.
NOTE: Sam and 'the carrier"s names have been changed. I take the confidentiality rules that seriously. I really do.