One idea could be creating an OC who is a long - lost relative of one of the main characters in Grim Tales. This OC could bring a new perspective and some hidden family secrets. For example, if the main character is a hero, the OC could be a villainous relative who challenges their beliefs and morals.
One idea could be a crossover with a classic fairy tale world. For example, merging the dark elements of Grim Tales with the magical world of Cinderella. The step - sisters could be even more malevolent in the Grim Tales version, and Cinderella could have some hidden powers. Another idea is to cross it with a superhero universe. Picture a superhero trying to solve the mysteries and dark secrets in the Grim Tales world. They would face challenges that are not just physical but also psychological due to the grim nature of the world.
A more complex fanfiction could be about a prophecy that involves both Naruto's world and the Grim Tales world. Characters from both sides would have to come together, like Naruto and some of the heroes from Grim Tales, to prevent a great disaster that would affect both universes. This would involve a lot of character development and world - building as they try to understand each other's cultures and powers.
One interesting idea could be exploring the darker sides of the characters. For example, showing how Naruto might struggle with more internal demons. Another could be re - imagining the story in a post - apocalyptic setting within the Naruto universe. Maybe Konoha has been destroyed and Naruto has to lead the survivors in a harsher world.
Another interesting concept is an OC who is a traveling merchant. They could travel across the various regions in the Tales of Vesperia universe, trading rare items and getting involved in different quests. Their interactions with the main characters could bring new storylines. They might also have a hidden past related to a powerful artifact that the main characters are seeking.
One idea could be to cross it with a popular fantasy series like 'Lord of the Rings'. The dark and spooky elements of Grim Tales could blend well with Middle - earth's magical creatures and landscapes. For example, the main character from Grim Tales could find themselves in Middle - earth and have to deal with orcs and other threats while also trying to find a way back home.
First, think about their appearance. Are they tall or short? Do they have any distinct features like a scar or unique hair color? For example, in Grim Tales, a character with purple eyes might stand out. Then, consider their personality. Are they brave, cowardly, kind, or cruel? If you want your OC to be a hero, they should have some positive traits like courage. Next, give them a backstory. Maybe they grew up in a poor family or were orphaned. This backstory will influence their actions and decisions in the fanfiction.
Some popular themes could be adventure. Grim Jr and Mimi might go on exciting adventures together, exploring strange and magical places. Another theme could be friendship. Their relationship could be centered around growing and learning from each other as friends. Also, mystery could be a theme, like they are trying to solve some strange happenings in their fictional world.
One idea could be a story where a new character, with the power of a Grim Reaper, arrives at Beacon Academy. This character has the ability to see the souls of the Grimm and can communicate with them in a strange way. They could be initially seen as a threat but end up helping Team RWBY in a big battle against a horde of powerful Grimm.
One interesting Tales of Zestiria OC fanfiction could be about an OC who has a unique ability that helps the main characters in a different way than in the original story. For example, an OC with the power to communicate with spirits on a deeper level, leading to new plot developments.
One idea could be a story where the main character has a different power origin. For example, instead of the normal power - getting ways in the story, they get their power from an ancient, forgotten pact with a minor demon. This would lead to a whole new set of challenges and plot twists as they try to keep it a secret from their friends and allies who might not understand.