I'm not sure specifically without more context, but usually there would be the two lovers at the center of the story. There might also be their friends or family members who play important roles in either supporting or opposing their relationship.
A side character's love story can be compelling by being unique. For example, if the side character has an unusual background or personality trait that influences their love life. Maybe they are a shy artist in a world of extroverts, and their love story involves them finding someone who truly appreciates their art and quiet nature. This contrast to the main story can draw in readers as it offers a different perspective.
One common trope is the 'unrequited love' where the side character loves someone who doesn't love them back at first. It creates drama and tension. Another is the 'forbidden love' where there are external factors like social class or family feuds preventing their relationship. For example, in some stories, a side character might be in love with someone from a rival family.
As we don't have much detail about this 'love shuttle side story', it's impossible to say for sure who the main characters are. However, if it's a love - related side story, it might feature characters who are in love or have some sort of romantic connection. Maybe there's a protagonist who is on a journey of self - discovery through love, and a love interest who helps or hinders that journey.
Without more context about 'Sadistic Love Side Story', it's difficult to determine the main characters. But we can make some assumptions. There could be a dominant character, the one with sadistic tendencies, who might be charming on the surface but has a dark side when it comes to love. And then there would be the other character, perhaps more naive or vulnerable, who gets drawn into this relationship. There might also be a friend or family member of one of the characters who tries to interfere or help, which could also make them an important part of the story.
There's no way to tell without more information about this 'love for sale side story'. It could have a whole range of characters depending on what the overall theme and plot of the story are.
I'm not sure who the main characters are as I haven't read the story. But they might be young people living in the 'hood'. There could be a male protagonist who is trying to find his way in life while also dealing with his feelings for a female character.
Not knowing the exact nature of the 'willow love story side story', we can only make assumptions. Willow is likely a main character. There could be family members of Willow who play important roles. For instance, a wise grandmother who has stories of her own love that influence Willow. And of course, there could be the person Willow is in love with, who might have their own unique traits and backstory that are explored in this side story.
I'm not sure as there's not much information given. But usually in a side story related to a love story, the main characters could be the friends or family members of the main couple in the original 'unintentional love story'.
The main characters would probably be those who play significant roles in the side story's plot. It could be characters that were secondary in the main manga but get more spotlight in the side story. They might be characters who are involved in a unique love triangle or some other complex relationship within the 'love is an illusion' framework.