A little advice for everyone—if you're considering giving your OC a mental health disorder but don't fully understand how it works or how to portray it accurately, please reconsider. It's not a good idea—ever.
If you’re unsure of what you're doing. Simply looking up a brief description online and basing your depiction on that isn’t enough.
Lately, I’ve come across some authors attempting to give their OCs dissociative identity disorder, and unfortunately, their execution completely missed the mark.
I get that some of you may have been inspired by Mutsumi from BanG Dream! Ave Mujica, who suffers from the exact same disorder. However, the way how that character develops DID is far more realistic compared to how some fanfic authors handle it.
Please be more considerate—these are serious topics and should not be tackled with lightly, not just thrown into a story for the sake of making it "edgy."
If you’re going to include it, make sure it makes sense. Otherwise, Just don't do it.