One possible theme could be identity struggle. Harry, as a wolf demon, would have to deal with his new identity on top of his existing one as the Boy Who Lived. Another theme might be isolation, as his new form could make him an outcast.
There could be a theme of acceptance. Harry would need to accept himself as a wolf demon, and also strive for others to accept him. Additionally, the theme of the battle between good and evil could take on a new dimension. His wolf demon nature might be seen as something evil by some, but he could use it for good, thus blurring the lines between the two.
One plotline might be that the dog demon is actually a cursed form of a wizard. In the fanfiction, it tries to find a way to break the curse while being in the midst of the Harry Potter universe. It could get help from Dumbledore or other powerful wizards. This would involve a lot of mystery and exploration of the magical lore of both the dog demon's nature and the wizarding world's magic.
In a 'Harry Potter is a Fox Demon fanfiction', the plot might start with Harry having strange dreams about fox demons. As he investigates, he finds out that his family has a long - lost connection to the fox demon realm. He then embarks on a journey to learn more about his heritage. Along the way, he meets other characters who are also related to fox demons in some way. They might form a group to fight against an evil force that is trying to use the power of fox demons for their own dark purposes. This could involve battles in both the wizarding world and the fox demon realm, with Harry having to use his knowledge of magic and his new fox demon abilities to protect his friends and the two worlds he now belongs to.
In fanfiction, the 'Harry Potter Demon of Fire' could play a mysterious role. It could be an enigma that draws in curious wizards, some of whom might end up being corrupted by it. It could also be a source of new magical knowledge. For example, if the demon is defeated, it could release a wave of ancient magic that the wizards can then study and use to their advantage. However, it's also likely to be a very dangerous entity that requires a great deal of skill and courage to deal with.
One common theme is the exploration of characters' hidden depths. In Harry Potter fanfiction, we often see more about the inner thoughts and feelings of minor characters like Neville Longbottom. In Wolf Rain fanfiction, it could be about the wolves' individual pasts. Another theme is the idea of a journey, whether it's Harry's journey to defeat Voldemort in a new way in Potter fanfic or the wolves' journey in Wolf Rain fanfic. And of course, there's often a theme of friendship or loyalty in both types of fanfiction.
One common theme is self - discovery. When Harry is a lone wolf, he often has to look deep within himself to find his true strength. For example, in many fanfics, he discovers new magical abilities that he didn't know he had.
The demon wolf familiar could make Harry more confident. Since he has this unique and powerful companion, he feels more capable of taking on challenges. For example, when facing bullies like Draco Malfoy, the presence of the wolf gives Harry an extra sense of security, which in turn makes him stand up for himself more often.
Yes, it's possible. In many fanfictions, the main character has to find a way to control whatever they summon. Harry, being a powerful wizard in the original series, might use his magic skills and knowledge to control the demon. He could use spells or magical objects to keep the demon in check.
One possible theme is the search for inner peace. In the Harry Potter world, characters often face great turmoil, and by introducing Buddhist concepts, they could seek inner peace through meditation or self - realization, like Harry might find a new way to deal with his PTSD from all his encounters with Voldemort.
Themes could include the blurred lines between good and evil. If Harry is a fan of Voldemort, it challenges the traditional view of their roles. Another theme might be the exploration of dark magic. Since Voldemort is associated with it, Harry's fascination could lead to a deeper look into the nature of dark magic.
Friendship is a big theme. Just like in the original Harry Potter series, in these fanfictions, the guitarist could form strong bonds with other characters while sharing their music. For example, they might write a song together to cheer up a friend who is going through a tough time.