The theme of redemption is also quite common. Maybe in a past life, one of the characters made a mistake that led to their separation, and in the reincarnated life, they get a chance to make it right. Also, the concept of soulmates is frequently explored. It's about two souls that are meant to be together no matter how many times they are reborn. And often, there's a bit of a struggle against the odds, like different social statuses or family feuds in different lifetimes that they have to overcome to be together.
Well, a lot of 'hitwoman reincarnated crossover fanfic' deals with the theme of change. Her reincarnation is a huge change, and she has to deal with it. There can also be a theme of discovery. She discovers new things about the world she's in, new abilities perhaps. And then there's the theme of relationships. In the new world, she has to form new relationships, and these can be very different from the ones she had in her life as a hitwoman. For example, she might have to learn to trust people in a world where she was used to being alone and relying only on herself.
One common theme is identity struggle. Since the OC is now in Shoto's body, they have to figure out how to balance their original self with the new identity. Another theme is power exploration. They have to learn to use Shoto's quirk effectively. And also, family relationships are often explored as Shoto has a complex family situation in MHA.
One common theme is redemption. Firestar may have made mistakes in his past life and in his reincarnation, he tries to make up for them. For example, if he had failed to save a certain cat in his previous life, he might strive to protect that cat or its descendants in his new life.
One common theme is identity. Percy has to figure out who he is in his new life. Is he still the same hero? Another theme is redemption. Maybe he made some mistakes in his past life and his reincarnation gives him a chance to make things right.
Power growth is a very common theme. Since the character is starting as a monster, often a weak one, they have to figure out how to become stronger. For example, in many of these fanfictions, the reincarnated monster will hunt for food or resources that can enhance their abilities.
One common theme is the struggle for survival. When reincarnated as a dragon, the protagonist often has to face various threats in a new and dangerous world. Another theme could be self - discovery. The character, now in the form of a dragon, has to learn about their new abilities and limitations. Also, there might be a theme of power and its consequences. As a dragon, which is typically a very powerful creature, the character has to deal with how this power affects their relationships with other beings.
Well, in this type of novel, a typical theme is the struggle against the old order. Since the protagonist is newly reincarnated as a god, they may face opposition from the existing gods or celestial beings. And then there's the theme of creation. Gods are often associated with creating things, so the story may involve the main character using their divine powers to create new worlds or species. Another possible theme is the exploration of morality. As a god, the character has to decide what is right and wrong on a much grander scale.
One common theme is self - discovery. Since Hermione is reincarnated, she often has to figure out who she is in this new life, especially when there are changes in her family or social status.
One common theme is starting anew. The protagonist gets a second chance at life in a different world, often with some special abilities or knowledge from their previous life. For example, in many of these novels, the character uses their modern - world knowledge to their advantage in a medieval - like fantasy world.
Power growth is a common theme. Since dragons are often depicted as powerful creatures, the main character, reincarnated as a dragon, usually goes through a process of getting stronger. For example, in many such novels, they learn new dragon abilities like breathing fire or flying faster.