Who could be the main characters in a 'Harry Potter mental hospital' fanfiction?

One possible plot could be that some of the Hogwarts students end up in a mental hospital due to the trauma of the wizarding wars. They form a support group within the hospital, using magic secretly to heal each other's mental scars. For example, Harry Potter could be haunted by the deaths he witnessed and struggle with PTSD in the hospital. Hermione might use her knowledge to research magical cures for mental illness.

Sakura could also be a main character. As a medic - ninja, she might be involved in Naruto's treatment in the mental hospital. She could bring her own knowledge and her relationship with Naruto into play, adding depth to the story.

Obviously, Harry, Hermione, and Ron could be main characters. They often get into trouble and end up in the Hospital Wing. They could be there to visit an injured friend or because they themselves are injured. Neville could also be a main character, maybe he discovers some new plants that have healing properties in the Hospital Wing.

Ron Weasley can also play an important role. He might be the one who accidentally causes an accident that sends someone to the hospital, and then feels really guilty about it. So he spends a lot of time in the hospital wing trying to make it up to the injured person, while also getting into some comical situations with the other patients and the Healers.

Perhaps a powerful monster in disguise as a doctor or staff member. They could be using the hospital's resources to create a portal to the underworld or something equally dangerous, and Percy has to stop them. They would be constantly trying to drive Percy crazy or keep him from interfering with their plans.

Lucy might also be a suitable main character. Her kind heart would lead her to try and help the other patients. She could use her celestial magic in unique ways to communicate with those who seem lost in their own minds. Maybe she gets trapped in the mental hospital while looking for a lost Celestial Spirit item and has to find a way to escape while also helping those in need.

The hospital staff also feature prominently. Nurses and doctors play important roles. A strict but kind - hearted doctor could be a main character, who is dedicated to finding new ways to treat the patients in Sakura Mental Hospital. The fanfiction might show their daily struggles and triumphs in dealing with the patients.

Well, in addition to Sakura, there might be a strict but fair psychiatrist. He could be a key character as he tries to diagnose and treat Sakura. There could also be a group of patients that Sakura befriends. For instance, a young girl who is in the hospital due to severe anxiety and an older man who has hallucinations. These characters could interact with Sakura in different ways, some being helpful, others being a hindrance to her progress in the mental hospital.

Neville Longbottom could be a main character. He has always had the potential for great things and in a world without Harry, he would be likely to step into the spotlight. He has the courage and the connection to Hogwarts that could make him a central figure in the fight against evil.

It's possible that the main antagonist is a new mythological creature that has the ability to manipulate minds. It has lured Percy and other demigods to the mental hospital and is slowly driving them insane in order to feed off their fear and chaos energy.