Annie is often depicted as a more reserved and calculating character. She keeps her emotions in check and is very strategic in her actions. Mikasa, on the contrary, is more passionate and driven by her love and loyalty. She is protective and doesn't hesitate to jump into action when needed.
Well, Annie is a very intelligent fighter. She can transform into a Titan which gives her an added advantage in combat. Mikasa, though, is an ace in human form. She's quick, agile and has great reflexes. In a battle of wits, Annie could try to set up traps or mislead Mikasa. But Mikasa is not one to be easily fooled. When it comes to strength, Mikasa's skills with the blades are deadly. If Annie transforms, Mikasa might be at a disadvantage at first but she could quickly figure out a way to counter. Overall, it's really hard to say who would win.
It's hard to say. 'Levi x Eren' fanfics are quite common in certain fandoms, but the 'Levi is a criminal' aspect makes it a more specific and perhaps niche sub - genre. If there are a lot of fans who like to see dark or morally ambiguous takes on the characters, it could potentially be popular within that subset of the fandom. However, it also might not be mainstream popular as it goes against the more typical heroic portrayals of the characters.
In the 'Attack on Titan' series, there is no clearly defined canon romantic interest for Levi. His character is mainly focused on his role as a soldier and his fight against the Titans. However, many fans like to ship him with various characters in fan - made love stories.
Maybe Levi is a criminal in the sense that he's part of an underground rebellion against an unjust regime. Eren, who is initially on the side of the establishment, meets Levi and gradually comes to understand his motives. Their relationship could develop as Eren has to decide whether to side with Levi or stay loyal to the regime, all while a romantic connection forms between them.
They could be original characters created by the fanfiction writer. Just two fictional people with their own personalities and backstories that the writer has developed specifically for this story.
She could also be a symbol of a larger group. Perhaps Annie represents all the women or a specific ethnic group who have faced systemic discrimination. The 'justice for Annie' campaign, based on her true story, could be a way to highlight the broader issues of inequality and fight for justice not just for her as an individual, but for the whole group she stands for.
Since we don't have the full story, it's hard to say exactly who Annie Brown is. She could be a normal girl who just happens to get caught up in a spooky situation involving a ghost.