One idea could be an OC human who discovers a hidden power within themselves that can interact with the Cybertronian technology in unique ways. For example, they might be able to heal damaged Transformers using a strange energy they possess. Another plot could involve an OC human getting caught in the middle of a battle between the Autobots and Decepticons and having to use their wits and new - found friendships with the Autobots to survive and help them. A third idea is an OC human who is a mechanic and accidentally creates a new device that attracts the attention of both Autobots and Decepticons, leading to a series of adventures as they try to keep it out of the wrong hands.
A great plot for Transformers Prime OC Human fanfiction could be an OC human who is an artist. They start having strange dreams about Cybertron and the Transformers. One day, they draw a picture that turns out to be a map to a hidden Energon source. The Autobots are intrigued and take the human along to find it. Along the way, the human has to learn to trust the Autobots and vice versa. Another plot might be an OC human who is a hacker. They manage to hack into a Decepticon communication system and learn of a planned attack. They then team up with the Autobots to stop it. And for the third idea, an OC human who has a family heirloom that is actually a Cybertronian artifact. This artifact has powers that both Autobots and Decepticons want, and the human has to decide who to trust with it.
One idea could be a human character who discovers a hidden power within themselves that can interact with the Cybertronian technology in unique ways. For example, they might be able to heal damaged Transformers using a special energy they possess.
One idea could be an OC who is a medic that gets captured by Megatron. Megatron initially sees the OC as a tool to use against the Autobots but gradually develops an odd respect for the OC's skills and tenacity. Another plot could involve an OC who has a special power that Megatron wants to harness for his own evil plans. As he tries to manipulate the OC, the OC starts to see through his lies and tries to turn the tables on him. A third plot might be an OC from a different dimension who accidentally lands in the Transformers Prime universe and catches Megatron's attention. He's intrigued by this strange new being and tries to either recruit or destroy the OC.
One idea could be an OC Decepticon who has a unique ability like being able to control electricity. The plot could revolve around this OC trying to prove their worth to Megatron by taking on difficult Autobot missions. For example, they target an Autobot outpost that holds a powerful energy source. The OC's journey to the outpost, facing Autobot defenses and internal Decepticon rivalries along the way, would make for an exciting story.
The OC could be from another planet that has a connection to Cybertron. Jack and the OC meet when she is looking for something on Earth related to her home planet. They start off as strangers but gradually fall in love as they discover more about each other's worlds.
One idea could be a story where Optimus Prime has to team up with an unlikely ally from another planet. Maybe a small, scrappy alien that has some unique abilities that can help in the fight against the Decepticons. This would add an interesting dynamic as Optimus has to learn to work with a very different being.
A plot idea could be that Optimus Prime time - travels. He goes back to the beginning of the war between the Autobots and the Decepticons and tries to prevent it from starting. Along the way, he meets younger versions of his friends and enemies and has to deal with the consequences of changing the past. Or perhaps, Optimus is trapped in a dimension where the laws of physics are different. He has to adapt quickly and find a way back to his own world while also facing off against new threats.
A Vehicon OC fanfiction could focus on their transformation into a more independent being. They might discover a hidden power within themselves that sets them apart from the other Vehicons. This new power could lead them on a journey of self - discovery and ultimately a change in their allegiance.
One common theme is the human OC's journey of self - discovery while being involved with the Autobots and Decepticons. Another is the relationship between the human OC and the Transformers, whether it's a friendship or a more complex bond. And often, there's the theme of the human OC helping to save the day in some way in the battles between the two factions.
One plot idea could be that Female Optimus Prime has to lead a team of misfit Autobots to save a planet from a new, powerful Decepticon threat. She has to use her unique leadership skills and strength to unite the team.
One idea could be exploring Starscream's origin as a 'baby' in the context of the Transformers Prime universe. Maybe he was created with a special purpose that was later forgotten or corrupted.