Yes, there are. Some might focus on Roy Harper's transformation into a vampire and his struggle to adapt to his new existence. For example, in some fanfictions, he could be trying to resist his newfound bloodlust while still maintaining his relationships with his friends.
One common trope is Roy Harper being a reluctant vampire. Maybe he was turned against his will and has to struggle with his new nature. Another could be his relationship with other vampire characters. He might form an alliance or have a rivalry. For example, he could team up with an older vampire who teaches him the ropes of the vampire world.
One common theme is the struggle with identity. Roy has to figure out who he is now that he's a vampire. Another could be isolation, as he may feel different from his human friends and allies.
Yes, there are some. You can start by looking on popular fanfiction websites like Archive of Our Own. Just search for 'DC Roy Harper is a vampire' and you'll likely find a variety of stories with different takes on the concept.
You can try fanfiction.net. It has a large collection of fanfictions, and there are likely to be some about Roy Harper as a vampire there. Just use the search function and type in 'Roy Harper vampire' to find relevant stories.
As he spends more time as a vampire, Roy could develop a new moral code. He might question the traditional vampire ways of hunting and killing. This could lead him to try and find a way to co - exist with humans in a more peaceful manner. For instance, he could work on developing a substitute for human blood that would satisfy his thirst.
Roy Harper's fate in the comics is not straightforward. Sometimes he's shown as dead, but comic universes are constantly evolving, and his status can change based on various creative decisions and story developments.
Fanfiction that involves abuse is highly unethical. In the case of Roy Harper fanfiction, it can be extremely distressing for fans who love the character. It goes against the general positive portrayal and can also promote harmful ideas about abuse, which is unacceptable in a moral society.
The story where Roy battles his own drug addiction is a very powerful one. It shows his struggle not only with the physical addiction but also the mental and emotional turmoil. His journey to overcome it and become a better person is inspiring.