Well, in many fanfictions, Natsu might initially be in shock. He's a passionate character, so he could react with anger. He might lash out at Lisanna or the person she cheated with. He could also go into a state of self - doubt, wondering what he did wrong.
Lisanna might face a lot of backlash from the guild. Her friends could be disappointed in her and might not trust her as much. She could lose her standing in the guild and have to work hard to regain people's respect.
Well, it can make Natsu more distrustful. If he gets cheated on in a fanfiction, he might become closed off emotionally. He could start to doubt his own worth in relationships and become more guarded.
In fanfiction where Spiderman gets cheated on, it often explores the emotional turmoil he goes through. It can be a way to add more depth to his character. Writers might show his vulnerability and how he copes with the betrayal. Maybe he throws himself more into his superhero duties to distract from the pain.
One possible outcome in this fanfiction could be Percy feeling a deep sense of betrayal. He might initially be in denial, not wanting to believe that he has been cheated on. This could lead to a downward spiral in his self - esteem as he questions what he did wrong in the relationship.
There could be many interpretations in such a fanfiction. Maybe it shows Naruto's vulnerability in relationships. It might be a way to explore his character deeper by putting him in a difficult emotional situation.
He could marry an original character created specifically for the fanfiction. This character could be a powerful mage from a far - off place who crosses paths with Natsu during one of his adventures.
One of the senior and more experienced members of the guild. They have seen a lot and know how things should be done in the guild. If Natsu acts in a way that goes against their long - established ways, they would not hesitate to berate him.