Thank you for your genuine and good faith question, my friend.

Happily, there is a very simple answer to this question.

The answer is that you have no control over the reaction to your fiction that its audience has.

That includes what fanfiction and fanart they create. That includes what characters people ship together. That includes the reaction that spiritual or mentally ill people have to your characters and your work.

Once your work is outside of your head and shared with the world, you don’t have any control over the thoughts about it that other people have.

You can reasonably ask people who believe they are kin of your characters not to talk to you about that, just like you can reasonably ask people not to share their headcanons, fanart, fanfiction etc about your work with you.

But the minute you try to actually control what your fans do or don’t do as a reaction to your work.

Oh boy.

That’s Anne Rice and Anne McCaffery territory, my friend.

Speaking as a fellow creator, best of luck. It’s scary to release your work to the public. People have all kinds of thoughts about it then.