Well, consider the idea of some new characters being introduced as part of the harem too. Maybe a Gem from a far - off colony who has heard of Steven's exploits and travels to meet him. Or a human girl who lives near the beach where Steven often is and becomes smitten with him. The harem could also include a fusion of two Gems that has a unique personality of its own and is attracted to Steven's inclusive and accepting nature. There are so many possibilities when thinking about who could be part of the harem in this fanfiction.
Perhaps Steven finds himself in a situation where he has to protect a number of characters, and in the process, they all fall for him. Like he could be on a mission to save some of the corrupted Gems, and as he heals them, they see his pure intentions and are drawn to him. This could lead to a harem where they all vie for his attention in different ways, some being more shy and others more bold in their affections.
A common plotline involves Spinel struggling to fit in on Earth, and Steven being her guide. He shows her the beauty of Earth and its inhabitants. This can lead to a deepening of their relationship as Spinel starts to trust and rely on Steven more. Another plotline could be Spinel having nightmares about her past, and Steven being there to comfort her, which further cements their bond.
The relationship in this fanfiction often explores themes of forgiveness and growth. Steven, with his nature of seeing the good in others, tries to help Spinel move past her pain. Spinel, who has been through so much, slowly starts to open up to Steven. It's a relationship that can be seen as a journey of two broken souls finding comfort in one another.
A possible plot is that Naruto and Steven are summoned to a world where a prophecy states they will form a harem to bring balance. Each member of the harem has a special role or power related to either Naruto's world of ninjas or Steven's gem world. As they interact, there are comical misunderstandings due to their different backgrounds, but they gradually form deep bonds and work towards fulfilling the prophecy.
Naruto would likely be very energetic and curious about Steven's gem powers. He might try to learn from Steven and incorporate those powers into his ninja techniques. The harem members would be drawn to Naruto's determination and Steven's kind heart. They would interact in a way that combines the action - packed nature of Naruto's world with the more emotional and relationship - focused aspects of Steven Universe.
Adventure is also a common theme. They go on different quests or face various threats together. This could be something like exploring an ancient gem ruin on Earth or fighting off a new enemy. The theme of acceptance is important too. Accepting each other's flaws and differences. Amethyst accepting Steven's sometimes naive view of the world, and Steven accepting Amethyst's wilder side.
Well, one aspect could be the unique relationship between Peridot and Steven in the fanfic. Peridot is such an interesting character with her growth and development throughout the series, and when paired with Steven, there can be many new storylines. Maybe it focuses on their friendship deepening into something more, or perhaps it's about them going on adventures together that are different from the main plot of the show.
In the context of the show's universe, it's a bit of a strange concept. Since fanfiction exists in our real - world fandom and not in the show's world directly. But if we were to imagine a meta - situation where he could access it, I suppose it could be possible. However, it would be a very surreal situation for him.
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.