Since I don't know the specific '40k love story', I can't say for sure who the main characters are. They could be anyone from soldiers to civilians in the 40k universe.
If it's a love story set in a sci - fi 40k universe, the main characters might be a male and female from different species or factions. For instance, a human male from a powerful military organization and a female alien who has a more peaceful nature. Their encounter and the subsequent relationship could form the core of the story.
Since we don't have much information, it's difficult to determine. But there could be a mafia boss as one of the main characters, and perhaps a young woman or man who gets involved with the mafia world through love.
There might be other characters like his classmates or friends who could be important in this 'little love story'. For example, a girl who might have a crush on Saiki and her actions and interactions with Saiki are crucial to the story. Her attempts to get closer to Saiki and Saiki's reactions form an important part of the narrative.
I don't know the specific main characters in 'K Town Story' since there's not much information given. They could be ordinary residents of K Town, like a shopkeeper, a student, or an artist.
Since I don't know the exact 'k seven story', I can't say for sure. But if it's a typical adventure story, there might be a brave protagonist, maybe a character named K or someone related to the 'seven' aspect.
There could be a brave and intelligent girl as one of the main characters. She might be the one who is not afraid to stand up to the k mafia when she discovers their presence in the school and at the same time, falls in love with someone related to it.
Another type of main characters could be the leaders of different factions. For instance, the commanders in the Imperial Guard who lead their troops into battle against various enemies. Their leadership skills, strategic thinking and the challenges they face while trying to protect their people are often the focus of the stories.
It's hard to say without reading the specific story, but it could be a Chaos Lord who serves Slaanesh. They would be a central figure, leading their followers in the pursuit of Slaanesh - inspired desires.
Well, there are Lee Eun - Bi, a girl who is bullied and has to face a lot in school. Then there's Lee Eun - Byul. Their relationship and the confusion between them is a big part of the story. Also, there are male characters like Han Yi - An who is involved in the love triangle with Eun - Bi. These characters are central to the story of 'School 2015' as they drive the plot forward with their actions and relationships.
I don't know for sure without reading it. But it could be the Space Marines. They are very common main characters in Warhammer 40k stories as they are the defenders of humanity.
One of the main characters is Ciaphas Cain. He is from the 'Gaunt's Ghosts' series. He is a bit of a reluctant hero, always getting into and out of trouble in the most interesting ways.