violent' angle, which is so far from most people's reality. The biggest mistake is treating the diagnosis as the whole personality. You have to build the character first—what's their sense of humor, what did they want to be as a kid, what annoys them? The schizophrenia is a filter through which they experience that established self, not the source of it. Symptoms like auditory hallucinations or paranoia aren't constant; they fluctuate. Showing a character having a relatively stable week, then a tougher one, creates realism. Research is non-negotiable. Read first-person accounts, watch interviews, look at work by creators who live with it. The goal isn't to make them a saint or a monster, but a person navigating an extra layer of internal complexity. Their struggle shouldn't be spectacle for the plot; it should inform how they solve problems, form relationships, and perceive the world's textures.
I'd also avoid the trope of them having a single 'insight' that magically solves the plot because they 'see things others can't.' That's a cheap narrative trick. Instead, maybe their paranoia makes them overly cautious, which saves them once but destroys a friendship another time. The consequences should be messy and human. The most respectful thing you can do is give them agency within their own story, not make them a puzzle for a neurotypical protagonist to figure out.