There could be a Zerg leader - type character that has the intelligence to communicate with humans. This character might be trying to find a new home for the Zerg on Earth without completely destroying the planet. It would be a complex character, having to balance the needs of its own race with the potential harm to Earth and its inhabitants.
Typically, the main characters would be the ones from 'The Notebook' like Noah and Allie. However, in fanfiction, there could be original characters (OCs) added. These OCs might be friends or relatives of the main characters, or they could be new people who come into the story and interact with Noah and Allie in different ways.
Often, there are antagonists as well. These could be characters who oppose Toshi's goals or values. They might be jealous of his abilities or have their own evil plans that Toshi has to thwart. In some cases, there could be a love interest for Toshi, which adds a whole different dimension to the story. This character could support Toshi in his adventures, or their relationship could be a source of internal conflict for Toshi as he tries to balance his feelings with his responsibilities.
Often, the main character is the original character (OC) created by the author. This character is usually a gamer who gets immersed in a particular game world.
Often, there is the original character (oc) who is the central figure. This could be a commoner who suddenly gets involved with the royals. Then there are the royal family members like the king, queen, princes, and princesses. For example, a prince might befriend the oc and help them navigate the royal life.
One interesting plot could be the Zerg adapting to Earth's unique environments. Maybe they find some plants or substances on Earth that either help or hinder their growth and evolution.
The main characters typically include the OC, who is designed to fit into the world of the Gate of Babylon. They might be a hero trying to master the powers of the Gate or a villain seeking to misuse it. Then, there are the characters from the original story that are relevant to the Gate. For example, the servants who might interact with the OC in various ways, either as allies or opponents. And sometimes, there are other original characters created by the writer that are related to the OC, such as a mentor or a sidekick.
Often, there are also characters who oppose the OC god of destruction. They might be heroes or protectors of the realms that the OC is set to destroy. These characters will try to stop the OC from causing destruction, leading to many conflicts and battles throughout the fanfiction. And there could be some side characters, like the friends or servants of the main characters, who add more depth and complexity to the story.
The main character is often the original character (oc) who is a saiyan. They usually have traits like super strength and a love for gaming.
Obviously, the OC son of Zeus is the central character. He's the one around whom the story revolves. But other common characters include Zeus himself. His presence, even if not always physical, looms large as the father of the OC.
The Ronin is typically a strong, silent type. He might be a lone wolf at first, but as the story progresses, he becomes closer to the OC. The OC could be a character who is out of place in the Ronin's world. Maybe they are from a different culture or have a different set of skills that make them stand out. They both bring something unique to the story, and their interactions drive the plot forward.