Since it's an 'extra story', it might feature characters from the main 'love equations' story. It could be the protagonists who were on a journey to understand love through equations and now in this extra part, they face new challenges or meet new people. Maybe there's a wise old character who helps them understand the deeper meaning of the love equations.
I'm not sure as the name doesn't give away the characters directly. But it could be lovers who are trying to figure out their relationship using the love equations.
It could be a story that delves deeper into the concept of love equations. Maybe it shows different ways love can be expressed or calculated in a fictional or metaphorical sense.
The main characters are the pilot and the stowaway girl. The pilot is in charge of the spaceship and has to follow the strict rules of the cold equations. The stowaway girl is an accidental addition to the ship's manifest, she boarded without realizing the consequences her presence would have on the ship's mission.
The main characters in 'the cold equations full story' are the spaceship pilot and the stowaway. The pilot is in charge of the ship and has to follow the strict rules of space travel. The stowaway, on the other hand, is someone who has boarded the ship without permission and whose presence endangers the mission.
The main characters in 'Cold Equations' are Marilyn and Barton.
Typically, there is a boy and a girl as the main characters.
The main characters are likely to be Sakura Kinomoto and Syaoran Li. Sakura is the cardcaptor, a kind - hearted girl with magical powers. Syaoran is also involved in the world of cards and has a special relationship with Sakura. Their love story is probably a central part of this extra manga.
The protagonist is one of the main characters. And there are various Servants like Saber, Archer etc. Each Servant has their own distinct personality and abilities that play important roles in the story.
Not having read it, I can only guess. There might be a protagonist among the regular passengers who has to deal with the extra passenger. There could also be a character who is initially hostile to the extra passenger, and another who is more sympathetic. Maybe there is an authority figure like a conductor or a ship captain if it's a story set in a vehicle or on a ship.
Since it's an extra story related to Soma, it's likely to feature the main protagonists from the original game. They might be joined by new characters as well. These new characters could be related to the existing ones in some way, like being from the same organization or having a common goal. However, without more information, it's hard to say exactly who the main characters are. It could also be that some minor characters from the main game get more spotlight in the extra story and become main characters in this new narrative.
The 'extra man' is surely a main character. Additionally, there might be characters representing the society he is in. For instance, there could be a group of people who conform to the norms of the community. Their reactions and interactions with the 'extra man' would be important. There may also be a character who is in a similar situation as the 'extra man' but has chosen a different path, which could create an interesting dynamic and comparison within the story.