Basically, it is the version of you when you are stressed - this may range from a slightly different version of your normal self to a polar opposite that even you may be hard-pressed to recognise.
Remember, your stress profile is NOT your personality.
If anything, it is a deviation from your personality, but still within the parameters of your "self". Like a MAC/MAE - now that's something we lawyers understand very well, don't we?
And we named them after nine colours - seven from the rainbow, plus black and white.