Obviously, the son of Trihexa is one of the main characters. His actions and development would be central to the story. Then there could be characters from the original 'Highschool DxD' series like Issei, who might interact with this new character in various ways, either as an ally or an opponent. Rias could also be a main character as she is an important figure in the original series and her reaction to the son of Trihexa would be significant.
The main characters would include the son of Trihexa, of course. But also, characters like Akeno, who with her own powers and personality, would likely have some sort of relationship with this new character. And we can't forget about the other members of the Occult Research Club. They might be involved in the story, either trying to understand the son of Trihexa or being affected by his presence. There could also be some new characters introduced specifically for this fanfiction that are related to the son of Trihexa's backstory.
One interesting concept could be the unique powers that the son of Trihexa might possess. Given Trihexa's status in the 'Highschool DxD' universe, the offspring could have extraordinary demonic abilities that set them apart from other characters. Another concept might be how this character interacts with the existing factions like the Devils, Angels, and Fallen Angels. Their heritage could lead to both suspicion and attempts to befriend or control them.
Yes, there might be. The Naruto and Highschool DxD universes are both quite popular, and the idea of combining them with a Trihexa element could be an interesting concept for fanfiction writers. You can try searching on popular fanfiction websites like Fanfiction.net or Archive of Our Own to see if such a story exists.
Issei could still be the main protagonist. His determination and ability to grow stronger could play a big role in any story involving Trihexa. He might be the one to face Trihexa head - on or try to befriend it.
Perhaps in this fanfiction, Naruto's skills and abilities from his own universe are used to deal with the chaos that the Trihexa might bring in the Highschool DxD world. He could form alliances with the characters from Highschool DxD and together they try to either control or defeat the Trihexa. It could also explore how Naruto's ninja way clashes or meshes with the values of the Highschool DxD characters. This could lead to interesting character development and plot twists as they navigate through the challenges presented by the Trihexa.
A plot could involve the main characters having to form an alliance with Trihexa to face an even greater threat. They would have to find a way to communicate and work with it, which would be a huge challenge considering its nature. This could lead to some interesting character development, especially for Issei as he tries to understand and tame Trihexa.
If Spawn were to interact with the main characters, he would bring a whole new level of seriousness. He has a dark past and a lot of baggage. When it comes to Issei's goal of becoming a harem king, Spawn might find it absurd but also interesting in a way. He could offer his own perspective on power and how to use it responsibly, which would be a contrast to the more carefree attitude of some of the Highschool DxD characters. And with the other characters like Akeno and Koneko, he'd be sizing them up, trying to figure out if they're threats or allies.
In addition to Gohan and Issei, Rias could be a main character in this fanfiction. She is a powerful devil and a key figure in the Highschool DxD universe. Her relationship with Gohan could be complex, especially when it comes to power dynamics and her own goals for her peerage. She might be intrigued by Gohan's power and want to recruit him or at least form an alliance with him.
It's likely that the main characters from the original 'Highschool DxD' series would still play important roles. Maybe Issei Hyodo would be there, adapting to the new quetzalcoatl - influenced environment.
One key element is the power of Trihexa. It's often a central focus as Trihexa is such a powerful being in the DxD lore. Another element is its relationship with other characters, whether it's an adversarial one or an unexpected alliance.
The Son of Thor OC would likely have a complex relationship with the main characters. With Rias, he could start off as an enigma. She'd be curious about his powers and his motives. He might be a bit of a wild card in her plans for her peerage. And with the other characters like Akeno, he could have some flirty interactions as she's attracted to powerful beings. But overall, his interactions would depend on how his character is written, whether he's more of a brash, power - hungry type or a more noble, heroic type.