In a Gohan in High School DxD fanfiction, Gohan could be a special exchange student. He has to balance his studies and his new life in this strange world filled with devils and angels. He might start a martial arts club in the school, which becomes popular. But his real purpose could be to find a way to bring peace between the different factions, using his Saiyan abilities and kind heart.
A great plot could involve a tournament in the High School DxD world that Gohan participates in. He teams up with some of the characters from that series. His different fighting style and abilities would shock everyone. There could be some sort of mystery or conspiracy behind the tournament as well, and Gohan's integrity and sense of justice would drive him to uncover the truth.
In Gohan High School DxD fanfiction, there could be a concept of Gohan's academic influence. Gohan is a very intelligent character. He might introduce new scientific ideas or study techniques to the students at the high school in the DxD world. This could lead to different character developments, as some characters might be inspired to pursue knowledge more seriously, and it could also affect the relationships between different factions in the story, as knowledge could be seen as a form of power.
Gohan and Issei would be really interesting. Issei is all about being a pervert and getting stronger in his own way. Gohan is this powerful yet humble Saiyan. Their different outlooks on power and relationships would create a lot of humorous and thought - provoking moments.
One popular pairing could be Gohan and Rias. Their personalities are quite different, with Gohan being more reserved and Rias being a strong - willed devil. The contrast between their powers and backgrounds could create an interesting dynamic in the fanfiction.
One possible plot could be Sans getting involved in the supernatural battles in the High School DxD universe. Maybe he uses his unique abilities from his original game to help out the main characters in a fight against a powerful enemy. For example, his bone attacks could be a useful addition to the combat arsenal in that world.
One idea could be that Superman, with his powers, becomes a sort of protector in the High School DxD world. He could use his super strength to stop any over - the - top fights that break out between the different factions. And his heat vision might come in handy when dealing with some of the more dangerous magical threats that lurk in the shadows of the school.
One idea could be Gohan arriving in the DxD world during a major crisis. His Saiyan powers would shock the devils and angels. Maybe he teams up with Issei to face a powerful common enemy.
One idea could be Leviathan using her unique powers in a new way to solve a mystery within the school. For example, she might use her water - based abilities to uncover hidden passages or secrets. Another could be a story where she forms an unexpected alliance with a character from a different faction to face a common threat.
Another plot could involve a time - travel scenario. Maybe a character accidentally sends themselves and some of their friends back in time to when the first devils were created. They would have to navigate this ancient world while also trying not to change history too much, or else it could have dire consequences for their present.
One idea could be a Dragonborn character arriving in the High School DxD world and having to adapt to the unique school and supernatural environment. They might use their dragonborn abilities to stand out in the Rating Games.