There could be a really interesting fanfiction where Female Sam is a mechanic who catches Optimus' attention. Maybe she helps repair him in a unique way and they form a bond based on mutual respect for each other's skills.
One great fanfiction where Sam dies is 'The End of the Road'. It's a really emotional piece that shows how the other characters deal with his loss. It delves deep into Dean's grief and how it changes him.
Some fanfictions with Sam's death also touch on the theme of the afterlife. They might explore where Sam goes after he dies, whether it's heaven, hell, or some other supernatural realm. This adds an extra layer of mystery and exploration to the story.
Well, perhaps in this fanfiction, Sam somehow ends up in the Transformers Prime universe. He might form a special bond with one of the Autobots, like Bumblebee. Together, they could go on adventures to stop the Decepticons from getting their hands on a powerful artifact. Sam's human ingenuity combined with the Autobot's strength would make for an exciting story.
They could form a strong friendship bond. Since they both are into Transformers, they'll have a common ground to build on. They'll likely be there for each other, sharing secrets about their Transformer - related dreams or discoveries.
Well, in this fanfiction scenario, Sam and Charlie might start by sharing their love for Transformers. They could exchange stories about their favorite Autobots and Decepticons. Maybe they'll team up to find a hidden Transformer relic or something. It could be a really exciting start to an adventure.
Another possible main antagonist could be a new character created specifically for this fanfiction. A powerful Decepticon who has a personal vendetta against Sam because he believes Sam will disrupt their plans for total domination. This new villain could have unique abilities that pose a great challenge to both Sam and the Autobots.
Female Sam could end up on a dangerous mission with Optimus. They might face a new type of Decepticon threat. Along the way, Sam uses her wits and human intuition to help Optimus strategize. And as they battle side by side, their relationship deepens into a strong friendship.
Yes, there was a sci-fi novel called "Movie Character Invasion." In it, a character entered the world of "Transformers", seduced the female lead, fought alongside Bumblebee, and received the system reward "Bumblebee." In this novel, one could experience a relationship similar to that between Sam and Bumblebee. I think this novel will suit your taste very well, so I recommend it to you! I hope you like my recommendation. Muah ~
To develop the characters further, you can put them in situations that force them to change. For instance, if Fem Sam is injured in a battle, Sideswipe has to take on a more nurturing role, which is new for him. This would show a different side of his character. And Fem Sam, while recovering, could have time to reflect on her life and her place in the Autobot team, leading to personal growth.