One interesting angle in a 'shadow meets maria fanfiction' could be the reactions of other characters. How do Sonic and his friends react to Shadow's encounter with Maria? It could create a lot of drama and tension within the story, as some might be suspicious while others might be understanding.
Perhaps a mysterious stranger who has some unknown vendetta against the Heartland family. This person could have been lurking around the ranch for a while, waiting for the perfect opportunity to strike. Or it could be someone within the community who has a hidden agenda and sees Amy as an obstacle to their plans.
Sure, there are. One of the great things about fanfiction is that it allows for so many different perspectives on characters' relationships. In the case of Shadow and Maria, some fanfictions might draw on their shared history and the trauma that Shadow experienced when he lost Maria. These stories can be really touching as they explore how that love still lingers in Shadow's heart and how it affects his actions and decisions in different situations.
Another idea is that they meet in a time - loop scenario. Every time they meet, something different happens, and they have to figure out how to break the loop. It could be a really cool concept for a fanfiction.
I'm not entirely sure about this specific 'Shadow and Maria the Human Lemon Fanfiction' without reading it. But generally, if it involves these two characters, it might explore their relationship in a unique way. Maybe it delves into their emotions, past experiences, or how they interact in a fictional setting.
Hope is also a theme. Maria was a symbol of hope for Shadow, so many fanfictions play around with how that hope can be rekindled or passed on. And of course, there's the theme of loyalty. Shadow's loyalty to Maria and her ideals is often a central part of these stories.
One common theme could be friendship. They might explore how Maria and Shadow Lemon become friends and the adventures they have together. Another theme could be growth, like how they grow as characters through their interactions.
Maybe it's a human who has somehow discovered the world of demigods and is afraid of their existence. They shoot Annabeth out of fear and misunderstanding. Another option is that it's a rogue demigod who has gone bad and is working against their own kind. This character could have a personal grudge against Annabeth specifically, perhaps because of her intelligence and leadership skills which they envy.