There might be a villain who is either a human supremacist trying to eliminate her because of her alien blood, or an alien warlord who wants to use her for his own gain. This villain would constantly be a threat to her and her friends, creating a lot of conflict and drama in the story.
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.
There could be Garrus. Since he's Shepard's close friend, he'd likely still be by Shepard's side, helping out in the post - war situation. Maybe they work together to take down any remaining threats.
Well, female Shepard is a central figure. She's known for her combat skills and strategic thinking. In the fanfiction with Ardat Yakshi, the Ardat Yakshi herself is also a main character. She might bring in elements of mystery and danger, as her powers can be both a gift and a curse. Their relationship, whether it's one of friendship, rivalry or something in between, is what drives the story forward.
One idea could be exploring how her half - Asari heritage affects her biotic abilities. Maybe she has a unique way of using biotics that combines both human and Asari techniques. For example, she could be able to create biotic shields with a different appearance or strength compared to a full - human or full - Asari. This could lead to interesting scenarios in combat where she surprises her enemies with her unorthodox biotic skills.
In some fanfictions, Female Shepard's powerful biotic abilities are enhanced by ancient artifacts. These artifacts might be discovered during a side mission, and once she gets hold of them, her biotic powers become so strong that she can even move entire structures with her mind. For instance, she could use her new - found power to collapse a building on top of a horde of enemies, crushing them all.
One great fanfiction idea could be that Female Shepard, as a super soldier, has to face a new and extremely powerful alien race. She uses her enhanced physical and mental abilities, which are a result of the super soldier program, to outwit and outfight them. Maybe she discovers some new powers along the way that are unique to her as a female super soldier.
One popular fanfiction with this concept might be 'Hybrid Horizons'. It explores the unique challenges and abilities Female Shepard has due to her half - Turian heritage. The story delves into how she is perceived by both humans and Turians in the Mass Effect universe. It also shows her forming new relationships and alliances based on her different nature.
Her cultural identity could be a major aspect. She has a foot in both the human and Asari cultures. Fanfiction could explore how she celebrates both cultures. Maybe she has a special way of combining human holidays with Asari traditions. Or she could be in a position where she tries to introduce Asari concepts, like their more communal living style, to humans while also trying to make Asari understand human individuality.
I'm not sure specifically as I haven't read the exact 'the good shepard novel'. But usually in such a novel, there would be the 'good shepard' character who is likely to be the central figure, perhaps a person with strong moral values and leadership qualities.
Obviously, her crewmates from the Normandy. Garrus would be there, being one of her closest friends. Tali too, as they had a strong bond. Liara would also attend, given her connection to Shepard.