Since I haven't read it, I can't say for sure. But it's likely to include doctors, nurses, and patients in the lakeside hospital.
There may be a new doctor who just joined the lakeside hospital and is trying to find his or her place. This character could be a main focus as they learn about the unique culture of the hospital and form relationships with the other staff. There might also be an older, more experienced doctor who acts as a mentor. And perhaps a patient who has a complex medical and personal situation that ties many of the characters together.
It could be that the novel delves into the daily lives of the hospital staff at the lakeside hospital. Maybe it shows how they deal with patients with love and dedication, and there could be various storylines involving the patients, their families, and the challenges faced by the medical team. For example, it might tell the story of a doctor who goes above and beyond in treating a difficult case, all out of a labor of love.
Since it's set at the Lakeside Supper Club on a Saturday night, the main characters might include the owner of the club. He or she could be a central figure, making sure everything runs smoothly during the busy night. There could also be a popular singer or performer at the club who draws in the crowds. And perhaps a couple who are having a date night at the club, and their relationship forms an important part of the story.
Since it's a hospital - set visual novel, the main characters might include an experienced doctor who is highly skilled but has some personal issues. There could also be a young and enthusiastic nurse who is always eager to help. And perhaps a patient with a mysterious illness that drives the plot forward as the other characters try to diagnose and treat them.
Since I don't know the exact 'wolf in hospital story', if it's a typical one, the main characters would probably be the wolf itself and the hospital staff, like doctors and nurses.
Naruto could also be a main character, even if he's not a medical expert. He could be visiting his injured friends in the hospital and accidentally stumble upon a conspiracy. His determination and never - give - up attitude would be useful in uncovering the truth.
Obviously, Naruto could be one of the main characters. He could be either a patient or someone helping out at the hospital. Another main character could be Sakura. Since she has medical skills, she could be a doctor or a medic - ninja in charge at the hospital. And then there could be a new character, like a young orphan who is being trained as a medic - ninja at the hospital and has an interesting backstory.
Often, the Cullens are main characters in Twilight hospital fanfiction. Since they are vampires, they might interact with the hospital in various ways, like bringing in a human they want to protect or dealing with a situation where their vampire nature is at risk of being exposed in a medical setting.
Since I haven't read the actual story, it's hard to say exactly. But it could be the patients in the hospital rooms with a view of the window. Maybe there are also nurses or doctors who interact with the patients and are somehow related to what the patients see or experience through the window.
Well, Chanwoo could be a patient with a rare disease. In that case, the main characters could be the medical team trying to cure him. There would be the lead doctor in charge of his case, a young and ambitious researcher who is determined to find a cure, and Chanwoo's family members who are constantly by his side, providing emotional support and sometimes causing a bit of drama in the hospital setting.
Obviously, the Avengers themselves would be main characters. Iron Man could be the one who funds the high - tech medical equipment in the hospital. Thor might have a hard time adjusting to the human medical procedures. And Black Widow could be using her espionage skills to find out if there are any threats in the hospital.