Highschool DxD OC x Koneko Fanfiction: What are some interesting plot ideas?

One idea could be Koneko's journey to master a new power. Maybe she discovers an ancient technique related to her Nekomata heritage and has to train hard to control it. Another plot could involve her forming an unlikely alliance with a character from an opposing faction to solve a mystery in the school that affects both sides.

A plot could involve Issei and Koneko getting trapped in an alternate dimension. In this dimension, they have to find a way back home while also dealing with the strange creatures and rules there. This forces them to rely on each other more than ever and could spark a romantic relationship as they fight for survival.

One idea could be an OC who is a transfer student with a unique power that no one in the Highschool DxD universe has seen before. This power could attract the attention of the main characters and lead to various adventures and alliances.

One plot idea could be Koneko adjusting to the high school life which is a mix of Naruto and Highschool DxD elements. For example, she might have to deal with different types of jutsus in the school setting as well as the devilish powers from Highschool DxD. Another could be her forming an unexpected friendship with a Naruto character, like Naruto himself, and they learn from each other's powers and cultures.

Perhaps the OC is a skilled musician and Sona, who has an appreciation for the arts, meets the OC at a school concert. They start collaborating on music projects and their relationship blossoms from there. The OC could also have some sort of hidden past related to the supernatural world that Sona helps them uncover.

Maybe the OC is an artist who can create magical art. Akeno is fascinated by this art and the emotions it evokes. They could start collaborating on projects that are not only artistic but also have a deeper meaning in the context of the Highschool DxD universe. For instance, creating art that can temporarily shield them from attacks or art that can influence the minds of their enemies. Their relationship could grow as they explore the potential of the OC's art together.

Maybe the OC Sitri is from a different branch of the Sitri family that has been in hiding. Their appearance in the story could stir up old rivalries or create new alliances. They could bring with them ancient knowledge or artifacts that change the power dynamics in the Highschool DxD world.

One idea could be the OC having a unique power that attracts the various characters in the harem. For example, if the OC can manipulate time in a certain way, it could lead to some really interesting situations. Maybe they use this power to save a member of the harem from a dangerous situation, which then makes that character develop strong feelings for the OC. Another plot idea is the OC being from a different dimension and having to adapt to the Highschool DxD world while building relationships with the harem members.

One idea could be that the OC is a new student at the school and immediately catches Akeno's eye. They start off as friends but slowly develop deeper feelings as they go through various supernatural battles together. Another plot could involve the OC having a special power that Akeno is intrigued by, and they bond over exploring and controlling that power.

One idea could be that the OC has a unique power that helps Rias and her harem in unexpected ways. For example, the OC might be able to sense danger before it arrives, allowing them to better prepare for battles against other factions. Another plot could involve the OC having a past connection to one of the members of Rias' harem, which creates some drama and tension as they navigate their new relationships within the harem. Maybe the OC is a long - lost relative or an old friend who has changed a great deal.