Well, Levi was born in the Underground. His early life was full of struggle. He faced poverty, violence, and a general lack of order. But these difficult experiences also honed his combat skills and his will to survive. As he grew up, he got involved in various battles and gradually became the strong and respected Captain Levi we know. He joined the Survey Corps later, bringing his unique combat abilities to fight against the Titans.
Reiner did die in the manga. His death was a result of a series of events and conflicts that had been building up throughout the storyline. It had a major impact on the plot and the other characters.
One of the best stories is when Flash has to outwit Captain Cold's new ice - based weaponry. Flash uses his super - speed to create heat friction and melt the ice. It shows the classic battle of speed against cold power.
Trust is also a big theme. Given Levi's background and his position in the Survey Corps, it takes time for him to trust someone. So, many fanfictions explore how the reader earns Levi's trust and how that trust evolves into a deeper connection, whether it's a platonic or a romantic one, but always in a non - sexual way.
One idea could be that the reader is a new recruit in Levi's squad. Levi's wife, being kind - hearted, takes the reader under her wing. She helps the reader with training and they form a deep friendship. As time passes, the reader discovers some hidden secrets about Levi's past through his wife, which adds an element of mystery to the story.