Ino would most likely be there too. Since they have been friends since childhood, Ino would be worried about Sakura's condition. She might bring some flowers and stay by Sakura's bedside, chatting with her about their memories and the village.
Sasuke would likely be very concerned. Even though he often has a cold exterior, his connection with Sakura is deep. He would probably visit her in the hospital secretly, not wanting to show too much emotion but still being there for her. He might bring her a special herbal remedy that he found during his travels.
Another possibility is that she contracted a rare disease while on a medical mission in a far - off land. Since she is a medical ninja, she might be exposed to various unknown pathogens. This could have led to her falling ill and being in the hospital.
His teammates, Sasuke and Sakura, would surely visit him. They are his closest comrades, and they would be worried about his condition.
His best friend Grover would surely visit him. Grover would bring some of Percy's favorite foods from Camp Half - Blood, like blue cookies. Annabeth would also be there. She'd probably be reading books on mythology, trying to find a way to help Percy get better faster.
Harry Potter could visit Snape in the hospital. Despite their past differences, Harry might feel a sense of obligation or curiosity. He could be there to finally have an honest conversation with Snape and perhaps gain a better understanding of his actions throughout the years.
His friends like Misty and Brock would probably visit him.
Hermione would surely visit. She'd be there with a stack of books, ready to help Harry catch up on his studies while he recovers. And Ron would be right beside her, probably with some treats from the Hogwarts kitchen.
There could be the patients, of course. Each patient might have their own unique backstory and personality. Maybe there's a young patient who is dealing with trauma, and Sakura has to find a way to reach out to them.
One possible plotline could be that her friends from the ninja team come to visit her. They bring her small gifts like flowers or her favorite food. As they visit, they share stories of their latest missions, which makes Sakura feel a bit better and less isolated in the hospital. Maybe Naruto tells her a particularly funny story about how he messed up a jutsu but still managed to save the day in a clumsy way.
One idea could be that Sakura uses her medical knowledge from her ninja training in a unique way at the mental hospital. For example, she might use her chakra control to soothe the patients' agitated mental states in a non - traditional therapeutic method.