Some fanfictions might focus on the backstories of X and Y. For example, exploring how X came to be who he is and how Y's past influenced her present actions. There could also be themes of redemption, where one of them has made a mistake in the past and is trying to make up for it with the help of the other.
One popular theme could be their adventures together. Maybe they go on a quest to a mysterious land filled with strange creatures. Another theme might be their friendship development, like how they overcome misunderstandings to become closer pals.
Obviously, X and Y are the main characters. X might be a brave and curious individual, always ready to take on new challenges. Y could be more of a cautious yet intelligent character, providing a balance to X's impulsiveness.
In this fanfiction, Harry could be brought into the Unspeakables to deal with some ancient and powerful magic that has been awakened. He may start off as an outsider among the Unspeakables, but gradually earn their respect. His adventures within the Department of Mysteries could include uncovering long - lost spells and artifacts. This could also lead to a conflict between his loyalty to his old friends and his new responsibilities within the Unspeakables.
One potential antagonist could be an ancient magical entity that has been awakened by the experiments of the Unspeakables. It sees Harry and the Unspeakables as a threat to its existence and tries to destroy them. Additionally, there could be a group of anti - Ministry wizards who believe that the Unspeakables are dabbling in dangerous magic and they target Harry as a symbol of the Unspeakables' activities.
Perhaps in this fanfiction, Harry's relationship with the wizarding world at large is very different. Since the Unspeakables are quite secretive, he may be seen as an enigma. He could be involved in solving mysteries that are related to the deepest secrets of the Ministry of Magic, which normal wizards are not even aware of.
His character may become more reserved. Growing up with the Unspeakables, who deal with secret and often dangerous magic, he would learn to keep his thoughts and actions guarded. He might not be as quick to trust others as he was in the original series.
One popular theme is alternate universes. Fans like to imagine what would happen if the characters were in different settings, like a steampunk world or a post - apocalyptic one.
One popular theme is their survival together. In many fanfics, they rely on each other's skills to make it through the harsh post - apocalyptic world. For example, in 'Surviving Together', they have to hunt for food and find shelter while also dealing with their growing feelings for each other.
One popular theme could be Natsu's unrivaled strength in battles. He might effortlessly defeat powerful foes that were once considered major threats in the original story. This can create a sense of awe and admiration among other characters and readers alike.
One popular theme is the redemption arc for Waluigi. In these fanfics, Rosalina might be the one to help him see the good in himself. For instance, she could guide him to use his devious skills for positive purposes like helping the Toads.
One popular theme is power struggles. Given the powerful nature of the Witchblade and the Darkness, it's common to see stories where characters vie for control over these forces. Another theme is redemption. A character who has been corrupted by either the Witchblade or the Darkness might seek to atone. And of course, there's the theme of love and relationships, whether it's a forbidden love between characters from different sides of the Witchblade and Darkness divide or a friendship that endures despite the chaos.