They don’t provide it to the system as a whole, but providing it to the subprocess constituting the normal personality is another matter. Author are often surprised by their characters, who may reveal having unexpected personality traits as well as doing things that the author would never have anticipated before. (Sometimes causing major headaches to the authors, as this ruins the original story that they’d planned out when the character decides to do something completely different.)
Tulpa don’t provide outside entropy.
They don’t provide it to the system as a whole, but providing it to the subprocess constituting the normal personality is another matter. Author are often surprised by their characters, who may reveal having unexpected personality traits as well as doing things that the author would never have anticipated before. (Sometimes causing major headaches to the authors, as this ruins the original story that they’d planned out when the character decides to do something completely different.)