So, les démoniaques are special people who some people think are possessed by demons. It's like in spooky movies where someone acts all weird and scary and people think they have a demon inside of them.
But in real life, there are some people who act that way and some people think it's because of a medical condition. It's called a mental illness, and it means that their brain doesn't work the way it should. Just like how sometimes our bodies get sick, sometimes our brains get sick too.
So when people think someone is a démoniaque, sometimes they try to help them get better by praying or doing other things. But really, what those people might need is to see a doctor who can help them with their mental illness.
It's important to remember that having a mental illness doesn't mean someone is possessed by a demon or bad in any way, it just means they need some extra help to feel better. And that's okay! We all need help sometimes.