Obviously, Kleo is the main character. But often, other Fallout 4 characters also make appearances. For instance, the Sole Survivor might be in the story, interacting with Kleo in various ways, like being her ally or sometimes her rival. Dogmeat could also be there, adding a bit of that cute and loyal element to the fic.
The main characters usually revolve around Kleo and those from her immediate Fallout 4 universe. However, some fanfics might introduce original characters. These original characters could be wasteland wanderers who cross paths with Kleo. They might have their own backstories and motives that then intertwine with Kleo's story, adding more depth and complexity to the overall fanfic.
In many 'Fallout 4 Kleo Lemon Fanfic', Preston Garvey can be a significant character. He might be involved in the story's plot, perhaps working with Kleo to protect a settlement or dealing with some sort of crisis in the Commonwealth. Piper Wright could also show up, with her inquisitive journalist nature bringing a different dynamic to the story, especially if she decides to write about Kleo.
Well, it really depends on your taste. If you like action - packed fanfics, look for ones where Kleo is involved in battles against raiders or super mutants. For example, 'Kleo: Wasteland Warrior' could be a great choice. Some fanfics also explore her relationships with other characters. 'Kleo and the Settler's Tale' shows her interactions with the settlers in the game and how she helps them, which is quite heartwarming.
Teachers can also be main characters in some school lemon fanfic. A young and enthusiastic teacher who wants to make a difference in the students' lives could be a central figure. Maybe he or she has to deal with difficult students or a strict school administration. Another type of main character could be the school principal, who has to manage all the chaos and drama that goes on in the school on a daily basis.
The main character is often the teacher from the original Gokusen series. They play a crucial role in guiding the students and dealing with the various challenges in the fanfic world.
Obviously, Charon is one of the main characters. The Lone Wanderer is also very likely to be involved as they have a connection in the original game.
Typically, you'll see the main characters from the original High School DxD series like Issei Hyoudou. He might be in a different role in the fanfic, perhaps more involved in the'slave' aspects of the story. Rias Gremory could also be a main character, maybe as a figure of power who has'slaves' under her command.
There could also be a mentor - like figure. Let's say Mr. Green, an old man who has a lot of wisdom. He gives Ellie advice when she is faced with difficult decisions in the fanfiction. In addition, there might be antagonists, such as a bully named Tom who constantly tries to make Ellie's life difficult.
Sometimes, there can be a new character introduced who becomes Diana's rival or love interest. This new character adds an extra layer of drama and plot development to the fanfiction.
Often, there are characters who are sweet - lovers. Maybe a young girl or boy who has a special affinity for chocolate and is at the center of the story.
Sometimes, the main characters could be metro workers. For instance, a young metro driver who discovers something unusual during his shift. Or it could be a maintenance worker who stumbles upon a hidden part of the metro system while doing repairs. Another type of main character could be a street artist who uses the metro stations as their canvas and has a whole story related to their art and the metro environment.
Obviously, hachishakusama is often the central character. It's the main focus of the fanfic.