If the character in the story did not say the words you're quoting, then you can't quote them. That would be an unauthorized reworking of the original you are citing. If a character didn't die in the original story, you likewise can't say that the character died. You can, however, describe the character as presented in the story and explore how a person with such characteristics might react to this or that, but you'd need to carefully mention which parts are quotes from the story and which are your own interpretation.