Do Baptists believe someone with multiple personalities has multiple souls?

Do Baptists believe someone with multiple personalities has multiple souls? What if someone has two personalities, like the [dissociative identity disorder](https://en.wikipedia.org/wiki/Dissociative_identity_disorder) and one has accepted Jesus as their Savior, and the other has not? Would these be two souls judged independently, one going to Heaven, and the other to Hell? The movie “Jonathan” though it is fiction, really got me thinking about this. Note: I edited the question to make it clear I am asking about the real disorder vs. the movie.