I don't know for sure since I haven't read the novel. But I would expect there to be the devil character as a main one. There might also be some students, teachers or other people in the school environment who interact with the devil.
I'm not entirely sure as I haven't read it specifically. But generally, it might be about a devil - like character going back to school days. Maybe it involves some sort of chaos or unique experiences that this devilish entity brings to the school environment.
I don't know for sure as I haven't read it. But likely, there is a character who has some sort of encounter with the devil. So, one main character is probably the one who is spending the ten days with the devil, and of course, the devil itself is a main character.
Since it's a virtual novel about school days, the main characters might include a typical high - achieving student who is always striving for academic excellence. There could also be a rebellious student who challenges the school rules. And perhaps a kind - hearted teacher who tries to guide the students through their problems. There might be a popular girl or boy who is at the center of the school's social scene as well.
Based on the title, it seems that one of the main characters is Kakeru, who is a devil. And there's likely another character, probably the narrator, who spends the 10 days with Kakeru.
Teachers might also be main characters in some ways. They guide the students, for instance, a very strict but fair teacher who has a big influence on the students' growth. There could also be the class clown type of student who always brings laughter to everyone around.
There's Kotonoha Katsura, a sweet and somewhat shy girl. She plays an important role in the story, especially in relation to Makoto. Another main character is Sekai Saionji. She is more outgoing and is also closely connected to Makoto and the events that unfold in the visual novel.
In School Days anime story, Makoto Ito is a key character. He is a typical high - school boy with hormonal urges. Kotonoha Katsura, a girl with long black hair, is one of the main female characters. She is initially the object of Makoto's affection. Then there's Sekai Saionji, an outgoing and somewhat bold girl. She becomes involved with Makoto in a rather complex way, and their interactions are a big part of the story.
I'm not entirely sure without reading the novel, but typically in a high school - set novel, there would be students. Maybe there's a popular student who is good at academics or sports. There could also be a shy student who gradually comes out of their shell during these last days.
I don't know for sure since I haven't read or played it. But typically, in a school - set visual novel, there could be students like the class president, the school athlete, and the new transfer student as main characters.
Since I haven't read the story, I can't say for sure. But it could be the students who have to ride the creepy bus. Maybe there's a brave student who tries to uncover the mystery of the bus.