Thread:SavageOpress1138/@comment-28795973-20180223223312/@comment-104549-20180224185941

Of course. One only has to type "Anakin Skywalker" into the Search bar to see the innumerable variations of that character that different authors have come up with, and all of that is okay.

In your specific case, however, I think Mirror Universe and Mirror universe may be a little too close because the titles are identical except for the capitalization; the goal is to avoid confusion. You'll notice those Anakin variations usually have parentheses with the creator's name or the universe in which that version of Anakin appears. You might want to change the title of yours to "Mirror universe (ElectricSupernova)" or "Mirror universe (ES)", or something to that effect. On any article page, you'll see an arrow next to the blue "EDIT" box; mouse over the arrow and select the "Rename" option to change the article's title.

To control how it appears in article text, the syntax is. Take, for example, my Untitled New Sith Wars series. I can always type that, but if I type, the result is this series I wrote. In your case, even if you change the title, you can still code it so it appears the way you want (so  would just read "mirror universe".

Hope this helps.