Maybe the Geth have a newfound understanding of Shepard's importance to the balance of the galaxy. After her death, they realize that without her, chaos will ensue. So they bring her back, but she has to deal with the fact that she was dead and now has to readjust to life, all while trying to figure out the Geth's true motives for resurrecting her. This could involve a lot of character exploration and political intrigue within the Mass Effect universe.
One possible plotline could be that the Geth see Female Shepard as a key figure in the fight against a common enemy, like the Reapers. So they use their advanced technology to resurrect her to help in the battle.
Well, another option is to check out some Mass Effect - related forums. There are often threads where fans share and discuss their favorite fanfictions. Reddit has some great Mass Effect communities where someone might have recommended a story with that plot. It might take a bit of digging through the posts, but it could be worth it.
In a fanfiction like this, the story could focus on Female Shepard's struggle to balance her Geth - influenced upbringing with the expectations of the rest of the galaxy. For example, she may face challenges when dealing with the Alliance, which has a history of conflict with the Geth. Her loyalty could be constantly tested as she tries to bridge the gap between two very different worlds.
In this fanfiction, Female Shepard's appearance and combat style could also be influenced by the Geth. Maybe she has some Geth - inspired augmentations that make her more formidable in battle. Her backstory would be a fascinating exploration of how a human can be raised by an alien race of machines, and how that shapes her into the hero (or anti - hero) she becomes in the story.
One common theme is the relationship between the female Shepard and the geth. It could be about building trust and understanding, as the geth are an alien species in the Mass Effect universe. For example, the story might focus on how Shepard helps the geth to rebuild and in the process, they form a unique bond.
A plot twist could be that the Geth resurrected Shepard not fully as herself. There are hidden memories or abilities that start to surface as she goes through various challenges. These could be related to an ancient prophecy or a long - forgotten experiment.
One idea could be that the resurrected Female Shepard has to deal with a new threat that emerged during her time of 'death' and the Geth play a crucial role in helping her understand this new enemy. Maybe some of the Geth have developed new abilities during this time as well.
You can start by searching on popular fanfiction websites such as Archive of Our Own (AO3) or FanFiction.net. Use the search terms 'geth rebuild' and 'female Shepard' on their search bars to see if there are any relevant stories available.
A third plotline could be centered around a misunderstanding. Suppose Shepard overhears something about Ashley that she misinterprets. This causes a rift between them for a while. But as they both realize that they can't be without each other, they work through the misunderstanding, and their relationship becomes even stronger as a result.
Perhaps there's a plotline where her half - alien nature makes her the key to a major intergalactic conflict. She could have knowledge or abilities that both sides are vying for. For example, she might be able to communicate with an ancient alien race that holds the secrets to a powerful energy source. This would put her in a dangerous position as she tries to navigate between the different factions without getting caught or killed.
Perhaps Female Shepard as a super soldier gets involved in a time - traveling adventure. She has to use her enhanced abilities to adapt to different time periods and deal with threats that could change the course of history. For instance, she might have to fight against an ancient evil that has been awakened in a different era.