Since I don't have access to 'first test graphic novel', it's hard to say for certain. However, in many graphic novels, there's often a central character who faces challenges. Maybe in this one, there's a group of friends where one is the main focus, like a lead character who has some special ability or mission that drives the story forward.
I don't know the exact main characters in 'first test graphic novel'. But if we think about common trends in graphic novels, there might be a hero - type character who is trying to overcome an obstacle. It could be a male or female lead. There might also be a mentor - like figure, an antagonist causing trouble, and some side characters who provide support or comic relief to the main character's story.
One idea could be to ask students to summarize the main plot of the graphic novel. This helps test their understanding of the overall story. Another is to have them analyze the character development. For example, how a particular character changes throughout the story and what events led to those changes. Also, you can test their knowledge of the graphic elements, like how the use of color or panel layout enhances the storytelling.
One of the main characters is Minami Shimada. She's an important part of the story.
There is Minami Shimada, who plays an important role. And then there are other students as well, like Akihisa Yoshii. They are all involved in the baka tests and the various happenings in the school.
Akihisa Yoshii is one of the main characters. He is often considered a bit of a 'baka' but has his own charm. Then there is Minami Shimada, a girl who has a certain relationship with Akihisa. There is also Hideyoshi Kinoshita, who has some unique characteristics.
I don't know specifically as there are many light novels with this name. But often in such light novels, there could be a young protagonist, perhaps a student who is smart but a bit of an oddball. There might also be his or her friends, like a girl who is really good at a certain subject but has a quirky personality.
Since I'm not familiar with this specific light novel, I can't tell you the main characters. But in a lot of light novels, the main characters are usually students or young people. So in 'baka no test light novel', it could be a group of students who are at the center of the story. They might be facing challenges together, and their interactions with each other would form the core of the plot. There could be a leader - like character, a comic relief character, and others who each bring something different to the story.
I'm afraid I can't name the exact main characters without having read it in detail. But from what I know about similar light novels, there could be a lead character who is somewhat of an underdog. He might be joined by a group of friends with diverse personalities. There could be a tsundere - type girl who is initially cold but warms up over time. And perhaps a nerdy character who is really good at academics but lacks in social skills. These are just speculations based on common character archetypes in light novels.
One of the main characters is Akihisa Yoshii. He's a bit of an idiot but also very endearing. He often gets into all sorts of comical situations with his classmates. Another important character is Mizuki Himeji. She's a smart and cute girl who has her own role in the various happenings in the school. And of course, there's Minami Kei who is also quite prominent in the story.