One common trope could be the complex character development of the villain. In many such novels, the villain is not just pure evil but has a backstory that led them to their actions. Another trope might be the power struggle. The villain often has to compete with the hero or other antagonists for power, influence, or resources. Also, there could be the trope of redemption or self - realization, where the villain starts to question their own actions and motives as the story progresses.
Some common tropes in villain oc fanfiction include the 'seductive villain' trope. This is when the villain uses their charm or attractiveness to manipulate others. It can add an interesting dynamic to the story. The 'vengeful villain' trope is also quite common. They are seeking revenge for some past wrong done to them. And then there's the 'evil legacy' trope. The villain oc is following in the footsteps of an even greater evil from the past, and they are trying to live up to that reputation or complete some unfinished evil business.
Well, there's the trope of the 'outsider villain'. This is an OC villain who doesn't fit into the normal hero - villain dynamic in the 'Boku no Hero Academia' world. They might have a completely different view on how things should be. Then there's the 'sympathetic villain' trope. Despite being a villain, the writer makes the readers feel sorry for them because of their past or current situation. Also, the 'mastermind villain' who is always one step ahead of the heroes is a common one.
One common trope is the 'outcast - turned - villain'. Your self - insert character might start as someone rejected by society or the hero system, and then decides to use their powers against it. Another is the 'secret - identity' trope. Your villain self - insert could have a normal life on the surface while secretly plotting villainous deeds. And the 'redemption arc' can also be a trope, where the villain self - insert realizes the error of their ways and tries to turn good.
There's the 'mad scientist' trope. Your villain could be a brilliant scientist who goes too far in their experiments and turns evil. Maybe they were trying to achieve something noble at first but lost their way. The 'corrupted by society' trope is also useful. If your character grew up in a very cruel and unjust society, they might become a villain as a way to rebel or survive. Also, the 'demon - possessed' trope where an outside force takes over and makes them do evil deeds.
In such crossover fanfics, it's not uncommon for a character to face a major loss that pushes them over the edge. Another trope could be a forbidden power that corrupts them. Also, a desire for revenge against a perceived injustice might cause the change.
Well, a typical trope is the 'loner villain'. They are often isolated, not really trusting anyone. This makes them more mysterious. Then there's the 'antagonist to the hero' trope. They are constantly in conflict with the main hero, which drives the plot. And there's the 'villain's lair' trope. It's usually a dark, forbidding place filled with all kinds of evil artifacts and minions.
Avoid the 'pure - evil - for - no - reason' trope. It makes the character one - dimensional. Every villain should have some sort of motivation, even if it's a twisted one. Also, don't just copy existing villains' powers or personalities directly. It lacks creativity. Another trope to avoid is the 'instant - redemption' at the end. If your villain has done truly heinous things, it should take more than a simple change of heart to redeem them.
One common trope could be the redemption arc. Often in Christmas stories, a character who has been mean or self - centered has a change of heart during the Christmas season. Another might be the family reunion trope, where family members come together despite past differences. And the gift - giving trope is also prevalent, showing the spirit of giving during Christmas.
One common trope is the 'Costume Porn', where the detailed and accurate period costumes are a major draw. For example, in shows like 'Downton Abbey', the elaborate dresses and suits add to the authenticity and visual appeal. Another is the 'Fish out of Water' trope, like a modern - minded character being thrust into a historical setting and having to adapt. This can create interesting character arcs and comedic or dramatic situations.