A group of Homeworld Gems who believe that Black Pearl has become too 'contaminated' by her interactions with the Crystal Gems and Steven. They see her as a threat to the traditional Gem order and send a special task force to capture or destroy her, which would make them the main antagonists as they try to stop Black Pearl from living her new life.
It could be a corrupted Gem that has the ability to disrupt Steven's new ways of sensing the world. This Gem might be able to create illusions that confuse Steven's other senses, making it difficult for him to rely on his friends or his new powers.
Obviously, Pearl is one of the main characters. She's the refined, sword - wielding Gem we know from the show. In the context of Pearl Lemon fanfiction, Lemon becomes a central figure as well. This new character could be anything from a mysterious new Gem to a human with some special connection to the world of Gems. Their interactions and the relationship between them form the core of the fanfiction stories.
Another option is an ancient evil that was once sealed away by the Diamonds long ago. But due to some recent events in the Steven Universe universe, it is starting to break free. This evil force could target Blue Diamond because of her past actions and Steven because of his potential to stop it.
It could be a corrupted Gem from the past that was somehow locked away and now resurfaces in the future, angry at the changes that have occurred. This Gem might not understand the new world order and wants to return things to how they were.
Well, in the 'Steven Universe' fandom, it's very likely that there are fanfictions about Steven and Pearl kissing. Since the show has such rich characters and complex relationships, fans are inspired to create their own stories. These fanfictions can range from sweet and innocent interpretations to more complex and thought - provoking ones, but they are all a part of the fans' love for the show.
Maybe Black Pearl discovers a hidden power within herself that is connected to a long - forgotten Gem technology. This power could be something that the other Gems either fear or desire. The fanfiction could explore how she deals with this new - found power and the reactions of the other characters in the Steven Universe world.
There could be a new type of gem hybrid that is half - corrupted. It has some of the powers of a corrupted gem but also some of the intelligence of a normal gem. This hybrid could be attracted to the unique energy that Mystery Girl and Pearl give off and wants to either absorb it or use it for its own dark purposes.
Pearl is often very protective. She makes sure Baby Steven is safe from any harm, whether it's from outside threats or just him getting into things he shouldn't. For example, she might gently stop him from touching a dangerous Gem device.
One aspect to consider in Steven Universe Pearl x OC fanfiction is the character dynamics. Pearl is a complex character, and when paired with an original character (OC), it can create interesting interactions. For example, the OC could bring out new sides of Pearl, like her more carefree or humorous side. The fanfiction might explore how their relationship develops over time, starting from initial meetings to deeper emotional bonds. It could also delve into how the OC fits into the existing world of Steven Universe, interacting with other characters and the unique setting.
A third idea would be to create a story where the Black Pearl has a sentient being inside it. This being could communicate with Steven and the others telepathically. It could be a source of great wisdom or power, but also comes with a dark side that the characters have to deal with. For example, it might try to possess one of the characters in order to achieve its own goals.