In some fanfictions, the OC is betrayed by the entire group they thought they belonged to. This could be a club or a team within the Highschool DxD universe. The group might turn on the OC because they see the OC as a threat to their status quo. Maybe the OC has powers that the group fears will disrupt their power balance. This kind of betrayal can lead to the OC having to find new allies or even go it alone, which can be a great opportunity for character development.
Well, in these fanfictions, a common plot twist is the revelation of a unique ability. Say, the OC dragon hybrid can communicate with all types of dragons, which gives them an edge in battles and negotiations. Sometimes, the plot twists involve relationships. For instance, the OC might be betrothed to a powerful character without their knowledge, and this creates a whole lot of drama. And then there's the plot twist where the OC's dragon side is suppressing a dangerous entity, and when it's released, it changes the whole story dynamic.
Authors can make the OC relatable. If the OC has common fears or desires like any normal person, readers will connect with them. For example, if the OC is afraid of being alone and the betrayal makes them isolated, readers can empathize. Additionally, the author can show the OC's struggle to overcome the betrayal. If the OC doesn't give up easily and tries to fight back or find a way to redeem themselves, it makes the reader cheer for them. This struggle shows the OC's strength in the face of adversity and makes the reader more sympathetic towards them.
Some common themes include mystery. Fanfictions may involve the OC trying to uncover secrets about Astaroth or the world they inhabit. Another is the theme of friendship. The OC could form a deep friendship with Astaroth, which then shapes their actions and decisions. And there's the theme of survival. In the dangerous world of Highschool DxD, the OC might have to fight for their survival, especially when associated with a powerful being like Astaroth.
Issei is often a central character in these fanfictions. Since he is the main protagonist in the original series, his relationships and potential betrayals are explored. For example, a situation where his friends or allies in the Occult Research Club turn against him for some reason, like jealousy over his growing power or a misunderstanding about his actions.
One common theme is power struggles. Since the Bael family is known for its power in the Highschool DxD universe, fanfictions often explore how different OCs within the Bael family vie for more power, whether it's political power within the devil society or more magical and combat - related power. Another theme is loyalty. OCs might have to decide where their loyalties lie, whether it's with their family, a particular faction, or a group of friends.
One common theme is the struggle of the OC fallen angel between good and evil. They often have to decide whether to follow their darker fallen angel nature or strive for redemption. Another theme can be their relationships with the other characters in the Highschool DxD universe, like forming alliances or rivalries with devils, angels, and other supernatural beings.
Another theme is identity. The OC has to figure out how being a Dragon Emperor fits into their new life in the Highschool DxD world. They might struggle with whether to embrace it fully or keep it a secret. For instance, they may worry about how their friends and foes will react to their true identity.
A plot could involve the mute OC being a new transfer student in the school. Their muteness makes them an object of curiosity and some characters might initially misjudge them.
Well, one possible plot could be that Natsu is betrayed in his own world and somehow ends up in the DxD Highschool universe. Maybe he has to deal with the different power dynamics and politics there while also trying to figure out who betrayed him in his original world. He might form new alliances with the characters in DxD Highschool and use his unique abilities to survive and seek revenge for his betrayal.
There could be an OC that is a bit of an outcast in the Bael family but has a heart of gold. This type of character often appeals to readers. They might have a special power that they keep hidden at first. In fanfictions, they could start off as a loner but then gradually become an important part of the story, forging new relationships and changing the dynamics within the Bael family and the broader Highschool DxD story. Their journey from being an underdog to a hero - like figure could make them a popular OC.