One common theme is the discovery of self. The OC often comes into Saiki's world and through their relationship, both characters learn more about themselves. Another theme is friendship. Despite Saiki's initial reluctance, a friendship forms which is central to many stories.
Another theme is the idea of Teruhashi trying to break through Saiki's emotional barriers. Since Saiki is often aloof, Teruhashi's attempts to get closer to him form a major part of many fanfics. It can be really entertaining to read how she tries different strategies to get his attention.
One common theme is the exploration of their unspoken feelings. Since in the original anime there's a lot of unexpressed emotions between them, fanfics often delve into how they might come to terms with their feelings for each other.
One common theme is the reader character having special powers or abilities that interact with Saiki's powers in interesting ways. For example, they might be able to nullify his telepathy accidentally.
One common theme is Saiki's struggle with his powers. In many fanfics, he tries to hide his psychic abilities from others while still having to use them at times, which leads to comical and tense situations.
One common theme is the reader having some sort of special relationship with Saiki. It could be a friendship or a romantic relationship. For example, the reader might be the only one who truly understands Saiki's powers and they form a deep bond.
A common theme is self - discovery. The OC often discovers new things about themselves through their interactions with Jasper. For example, they might find out they are braver or more empathetic than they thought.
Common themes in 'x oc pregnant fanfic' often revolve around the emotional aspect. The oc may experience a range of emotions from fear to joy. There can be a theme of protection, where 'x' becomes very protective of the oc and the unborn child. Social implications can also be a theme, like how the couple is perceived in their community or within their fandom. Additionally, there could be a theme of growth, both for the relationship between 'x' and the oc and for the individual characters as they step into new roles as parents - to - be.
One common theme is redemption. The OC might help Scorpion find a path towards redemption from his past deeds. Another theme is love. It could be a slow - burn love story between the two characters. And power, like the OC having some special power that either complements or challenges Scorpion's own powers.
One frequent theme in 'Obito x OC fanfic' is the exploration of power and how it affects relationships. The OC might have unique powers or abilities that interact with Obito's. For example, if the OC has a power related to time - travel, it can create an interesting dynamic with Obito's own powers. Also, the theme of loyalty is often explored. As Obito has had issues with loyalty in the original story, the fic might show how the OC helps him regain his sense of loyalty or how they are loyal to each other in difficult situations. It can be really engaging to see how these themes play out in different fics.
One common theme is friendship. Since Momonga is often in a new and strange world, having an OC as a friend can add a lot of depth to the story. Another theme is adventure. The OC usually joins Momonga on his various adventures in the new world.