In my story, my MC knows one character as Eli, and she only meets him in an alternate reality. She also knows of someone as Nathan, though she has never met him, and he resides in normal reality. Toward the end, she realizes that the two are one same person. From that point on, she is meeting him, in turns, in both aspects of reality. MC has a hard time reconciling with the fact that “they” are a single person, partly because they're so different from one another. I have explained, through her voice, that in alternate reality, he will always be Eli to her. And when she thinks about his predicament in normal life, the name Nathan sticks in her mind. My alpha reader thinks this may be confusing to the reader, and that MC should call him Eli/Nathan or Eli-Nathan. This looks odd to me and I’m not sure how to go on about this. I know this may be hard to judge without seeing the whole story, but I would appreciate any suggestions.