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.
One interesting 'Betrayed Highschool DxD Fanfiction' could be where the main character is betrayed by his friends in the Occult Research Club and has to find a new path on his own. Maybe he teams up with some unexpected allies from the underworld.
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 interesting plot could be where a main character is betrayed by a close friend within the Highschool DxD universe. For example, a devil might be betrayed by another devil who has a hidden agenda related to power or territory. This could lead to intense battles and power struggles as the betrayed character tries to seek revenge and regain their status.
Power struggle is also a frequent theme. Naruto is a powerful ninja, and in the High School DxD world, power is highly coveted. His powers might attract the wrong kind of attention, and those who want to gain or maintain power could betray him to eliminate a potential rival.
One possible fanfiction idea could be that Naruto, who somehow ends up in the world of High School DxD, is betrayed by some of the devils there. Maybe they initially seem friendly but then backstab him for his power or because they fear his potential. Naruto, being the resilient character he is, would then have to find a way to overcome this betrayal and prove himself.
Naruto would likely become very distrustful. After being betrayed by Rias, he would find it hard to trust anyone else in the Highschool DxD world. This could isolate him and make his journey much more difficult as he would be on his own without allies.
First, you need to understand the basic world and characters of Highschool DxD. Then, think about a unique way for the betrayal to occur. It could be a betrayal of trust, like a character sharing secrets. Next, plan out how the betrayed character will react. Will they be angry? Sad? Or determined to get revenge? Finally, start writing and let your creativity flow.
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.
Naruto's reaction could be a mix of sadness and resolve. He has a big heart, so the betrayal would cut deep. But he also has the will of fire within him. He could use this as fuel to rise above the situation. He might seek out new allies in the High School DxD world, like Issei and his friends (if they weren't part of the betrayal). Together, they could work towards uncovering the truth behind the betrayal and taking on any threats that might be related to it.