Okay here’s the down low:
If someone has a mental illness that makes them hallucinate things, you DON’T tell them that their hallucinations are real just because they have a mental illness and need to be pampered. You can say “I believe that you see those things, but I don’t”
But don’t for the love of god tell them things like what they are seeing are real/ghosts/paranormal/demons/etc. Don’t tell them that person who doesn’t exist who’s antagonizing them actually exists. Don’t make the hallucinations stronger by validating them.
Just like when someone is saying they believe they are a fictional character and tack it on mental illness to excuse it, you don’t just defend their mental illness and go “YEAH YOU ARE!”
The proper response is generally to suggest that person gets help, especially if they are aware their mental illness is making them think things that aren’t real.
At least I can admit that I have subpersonality and that while my characters are real to me personally, it does not make them REAL in the real world.
The person in question blocked me when I suggested getting psychiatric help.
I personally don’t believe that they don’t actually believe they are bakura, I think they are just looking for attention. That isn’t to say that there aren’t people who are like that, I just don’t think that this specific person has that particular mental illness.