Another idea is a fanfiction set in an alternate universe where Medusa is not completely evil. She and Stein meet in a more normal setting, like a school for magic and science. They start off as rivals in their studies but slowly develop feelings for each other as they discover they have more in common than they thought. There could be a lot of tension and drama as they navigate their new relationship while also dealing with the expectations of their different worlds.
In fanfiction, their relationship can be explored through dialogue. Have them engage in deep conversations about their views on life, death, and the nature of the world in Soul Eater. For example, Stein's scientific mind might clash with Medusa's more devious and magical thinking, but through these conversations, they can start to bridge the gap.
I think it is. The plot has depth, the action scenes are exciting, and it has a good mix of humor and drama. However, it might not be for everyone depending on personal preferences.
The Soul Eater manga did end. It wrapped up its plotlines and gave a satisfying conclusion to the fans. However, opinions on the ending may vary among readers.