One common theme is identity. Harry has to figure out who he is now that he's a vampire. Another is the idea of power. Vampirism often brings new powers, and Harry has to learn to control them. And of course, there's always the theme of relationships, how his new state affects his bonds with others.
There's a fic where in 'Blood Bonds Vampire Harry Fanfic', Harry is turned into a vampire and has to navigate the vampire society. This fic shows his struggle to keep his old values while adapting to his new vampiric instincts. It also has some interesting plot twists like his encounters with other magical creatures who have different views on vampires.
In Naruto fanfiction, 'Bonds of Blood' often explores the deep family - like relationships. It could be about the bond between Naruto and his parents, or among the members of his extended 'family' in Konoha. These bonds are usually depicted as strong forces that drive the characters' actions and development.
The unique relationship between Harry and the dragon. Dragons are powerful and dangerous creatures in the wizarding world, so seeing Harry form a bond with one is exciting. It goes against the norm of how people usually interact with dragons.
It could be that the dragon is a special kind, perhaps a rare breed that has some unique abilities. Harry bonds with it because he realizes that the dragon is being hunted by dark wizards. They team up to fight off the hunters. Harry uses his magic skills and the dragon uses its strength and firepower. Their bond grows stronger as they face these threats together.
A possible fanfic idea is that Snape discovers that Harry has a hidden talent for potions, similar to his own. He then decides to take Harry under his wing privately, away from the prying eyes of the other students. This could lead to some interesting interactions as Snape tries to teach Harry advanced potions techniques while still maintaining his gruff exterior.
Some fanfics explore the family bond between Hermione and her Muggle parents. They might show how Hermione's magical world affects her family in ways not shown in the original books. For example, how she tries to protect them from the darker aspects of the wizarding world while still maintaining a close relationship. Also, the family bond between Draco and his parents is a rich area. Fanfic writers may explore Lucius' expectations of Draco and how Narcissa tries to balance between her husband and son, showing a complex family structure within the Malfoy family.
A sense of belonging is another important theme. In Naruto fanfiction related to 'Bonds of Blood', characters often seek a sense of belonging within their family unit. This could be a character who was previously an orphan, like Naruto, finally finding a true family connection. It can also be about characters from different clans coming together and forming new 'bonds of blood' based on shared experiences and mutual understanding.
There's a good chance. Fanfics are known for their creativity and bending of established norms. If the fanfic is centered around this idea, then Harry could very well be an ancient vampire. This could lead to interesting plotlines involving his vampiric powers, his interactions with other characters who may or may not know his true nature, and his struggle with his new identity.
Well, in such a fanfiction, it could explore a unique bond between Harry and the phoenix. Maybe the phoenix serves as a guide or a source of power for Harry. It might have some special abilities that help Harry in his adventures, like healing him or giving him visions.