One common theme is redemption. Snape is often depicted as finding some form of redemption through his interactions with magical creatures. For example, in some fanfics, his cold exterior softens as he cares for an injured creature.
Another theme is discovery. Snape discovers new aspects of himself or the magical world through his encounters with creatures. It could be a new magical ability related to the creatures or a new understanding of his place in the wizarding world. This theme often adds an element of self - growth to the stories.
The theme of understanding is quite prominent. Harry has to understand the needs and behaviors of the creatures. Sometimes, the creatures are misunderstood by the wizarding community, and Harry is the one to bridge that gap. For instance, a seemingly dangerous creature might actually be gentle once Harry gets to know it better.
One common theme is self - discovery. Since it's a female Harry, she often has to discover her own identity in a world that has different expectations. Another theme is the bond with the creatures. These stories usually focus on how the special connection with the magical creatures helps Harry in her journey.
One common theme is identity. When Bella becomes a supernatural creature, she has to redefine who she is. For example, if she's a vampire, she has to deal with her new instincts and powers.
One common theme is the clash of different supernatural cultures. For example, the magic of Harry Potter and the vampirism and lycanthropy in Twilight. Another theme is friendship across different universes. Characters from both series often form new alliances and friendships.
Friendship is also a big theme. For example, Bella forms strong bonds with the mythical creatures she meets, like a deep friendship with a mermaid in some fanfictions. This friendship helps her navigate the challenges in the stories.
One common theme is self - discovery. Harry realizes his submissive nature and has to come to terms with it. Another theme is power dynamics. His submissive state often changes the power balance with other characters in the story.
One common theme is friendship. Female Harry often forms deep and unique friendships with magical creatures. Another theme is self - discovery. Through her interactions with the creatures, she learns more about herself.
The theme of forbidden love often shows up. In the wizarding world, relationships between humans and certain creatures might be frowned upon or even against the rules. Fanfictions play with this idea, showing the struggles Harry and the creature face due to the potential disapproval from the wizarding society.
One common theme is self - discovery. Harry realizing he can shapeshift often leads to him learning more about himself and his place in the wizarding world. For example, he might discover that certain creature forms bring out different aspects of his personality.
One common theme is the exploration of the 'otherness' of Castiel as a creature. How his non - human nature makes his relationship with Dean more complex. For example, in many fics, his inhuman strength or abilities might be a source of both help and trouble in their adventures together.