A plot could involve the human forming a deep bond with the Sparkling Arcee. As they grow together, the human teaches the sparkling about human emotions and values, while the sparkling in turn shows the human the wonders of the Cybertronian world. This bond could be tested when other Autobots are unsure if a human should be so close to a sparkling.
One plot idea could be that Bumblebee and Arcee have to team up to protect a powerful artifact from the Decepticons. They start off not getting along well due to their different fighting styles, but as they face challenges together, they learn to respect each other and become a great team.
In the fanfiction, Jack and Arcee could be magically merged into one being for a short time, and during that time, they create a new form of life. They then have to deal with the consequences of this unexpected creation and learn to be parents to this new being.
One idea could be that Jack discovers a hidden power within Arcee that she was not aware of herself. They then have to go on a quest to find out more about this power and how it can be used to help the Autobots in their fight against the Decepticons. Another plot could be that Jack gets lost in a dangerous part of Cybertron and Arcee has to brave all sorts of perils to find and rescue him.
One idea could be that Baby Bumblebee gets lost during a battle and Arcee is the one who finds him. She then has to protect him while they try to find their way back to the Autobot base. Another could be a story where Arcee teaches Baby Bumblebee some important combat skills in a fun and unique way. Maybe she creates a sort of training course just for him.
One plot idea could be that Starscream and Arcee are forced to team up during a crisis on Cybertron. Maybe a new threat emerges that endangers both Autobots and Decepticons, and they find that they have to rely on each other's skills. For example, Starscream's flight abilities combined with Arcee's combat skills could be a great asset. Another idea is that there is some sort of memory - sharing accident. Starscream and Arcee end up seeing each other's pasts and gain a new understanding of one another, leading to a strange, new relationship.
Another plot could be set in a post - war scenario. The Autobots are rebuilding their world, and Optimus Prime and Arcee are tasked with different aspects of the reconstruction. However, they keep finding excuses to work together. As they do, they gradually fall in love while also dealing with the trauma of the war and the challenges of creating a new future for their kind.
There could be a fanfiction where Bumblebee loses his memory. Arcee takes it upon herself to help him regain it. She takes him to all the places they've been together, shares their memories, and tries to jog his memory. As she does this, she also realizes how much Bumblebee means to her and how important their relationship is. This is a story about friendship, loyalty, and the power of memories.
Imagine a scenario where Arcee is paired with an Autobot from a different faction for a special mission. At first, they don't get along, but as they face various challenges together, they start to fall in love. Their relationship causes a stir among the Autobots as they have to deal with different ideologies within their own group while being in love.
In Transformers fanfiction involving humans, there can be many exciting plotlines. For example, a human might form an unexpected bond with a Transformer. This could be a friendship where the human helps the Transformer understand human emotions and culture better. It might also lead to a situation where they have to team up to face a common enemy, like another group of evil Transformers or some other threat from the human world.
The relationship could develop through shared experiences like exploring new places. For example, the human could take the Sparkling Arcee to a beautiful natural location on Earth that Arcee has never seen before, and this shared wonder could deepen their bond.