One common trope in 'Star Hero DxD Fanfiction' is the power - up. For example, Issei often gets some new and amazing powers related to the stars. Another is the alternate universe concept, where the DxD world has different rules or relationships. And the crossover trope is also popular, like combining DxD with other sci - fi or fantasy elements from different series.
In 'Star Hero DxD Fanfiction', a popular trope is the discovery of ancient powers or artifacts. It usually involves a character finding something that has been lost for ages and it changes the course of the story. The team - up trope is also big. Characters who normally wouldn't work together in the original DxD story form alliances. For example, devils and angels teaming up. And the 'chosen one' trope is often used, where a character is destined to save the DxD world from some great threat related to the stars or other cosmic elements.
One popular trope is the 'Fish out of Water' scenario. For example, a character from Prototype suddenly finding themselves in the Highschool DxD world full of devils, angels, and other supernatural beings. It creates a lot of comical and interesting situations as they try to adapt.
A less common but still interesting trope is the 'reversal of roles'. In some fanfictions, Issei might find himself in a world where his devil powers are seen as something different or even feared in a new way. Maybe in a world of pure angels, he is the outcast and has to prove himself not to be an evil entity. This trope allows for a lot of character exploration and development for Issei.
The crossover element itself is a huge trope. Combining the unique worlds of Naruto, Highschool DxD, and the concept of ghouls allows for all kinds of interesting scenarios. Such as when the different magic systems and ninja techniques interact. For instance, a character might try to use a jutsu in the world of Highschool DxD or combine a devil's power with a ghoul's ability.
The 'Alternate Universe' trope is very much used. For example, an alternate universe where the events of Unlimited Blade Works and Highschool DxD are intertwined from the start. Maybe the Grail War is a regular occurrence in the Highschool DxD world. Another trope is 'Identity Reveal'. A character might be hiding their true identity from one universe while in the other, and when it's revealed, it causes a stir. Also, the 'Forbidden Love' trope can be interesting. If there are rules against a relationship between a character from Unlimited Blade Works and one from Highschool DxD, like a magical or social taboo, it can create a lot of drama and tension in the fanfiction.
One popular trope is the 'fish out of water' where Buffy is suddenly in the Star Wars universe and has to adapt. For example, in many stories, she struggles to understand the concept of the Force at first. Another is the 'power - up' trope where Buffy gains new powers related to the Force or Star Wars technology. She might become an amazing lightsaber wielder or be able to use some unique Force ability.
In Star Wars Avengers fanfiction, the 'hidden - heritage' trope can be seen often. Maybe a character discovers they have a connection to the other universe in their family history. The 'redemption' trope is also popular. A villain from one universe might find redemption by helping the heroes of the other universe. And let's not forget the 'love - across - universes' trope, where characters from Star Wars and Avengers fall in love despite their different origins.
One popular trope is Loki as a 'fish out of water' in the Star Wars universe. He's used to the world of Asgard and suddenly finds himself in a completely different setting with different rules and species. It leads to a lot of comical and interesting situations.
A common trope is the 'fish out of water' situation. For example, a Naruto character suddenly finding themselves in the Star Wars universe or vice versa. They have to adapt to the new rules and cultures. Another popular one is the power - up trope. A Naruto character gets enhanced by the Force or a Star Wars character gains chakra - like abilities. It makes for exciting battles and new character developments.
One popular trope is the 'Training Montage'. Writers love to show Izuku going through intense training to become a stronger hero. It gives a sense of his determination and growth. Another is the 'Underdog Triumphs' trope. Since Izuku starts as an underdog in the original story, this is often carried over and amplified in fanfiction. He might defeat a powerful villain against all odds. And the 'Found Family' trope is also common. Izuku forms strong bonds with his classmates or other heroes, and these relationships are explored in depth, showing how they support and grow with each other.
One popular trope is the 'character swap'. For example, a character from My Hero Academia might take on the role or abilities of an Overwatch character and vice versa. Another is the 'team - up' trope, where heroes from both universes come together to fight a common enemy. It's exciting to see how the different powers and skills interact.