If the author is here, a nitpick on the writing: if you use the "let call him XYZ" thing, then _use XYZ to address the persona_ later in the text! Mark, Sarah a

If the author is here, a nitpick on the writing: if you use the "let call him XYZ" thing, then _use XYZ to address the persona_ later in the text! Mark, Sarah and Emily for instance appear exactly ONCE in the text, when you say "let's call them XYZ".