One great fanfiction with this theme could be 'Hermione's Close Call' where Fred is constantly by Hermione's side after she has a near - arm - breaking accident during a Quidditch match gone wrong. It shows his concern in a really sweet way.
In fanfiction, Fred's worry about Hermione breaking her arm can be a catalyst for character growth. His worry forces him to face his feelings for Hermione. This internal struggle can add depth to the plot. He may also become more assertive in trying to keep Hermione safe, which could lead to conflicts with other characters who have different ideas about how to handle the situation. This can create a complex web of relationships and events that drive the story forward.
In the comics, Yelena doesn't kill Clint. Their relationship is complex but not marked by such a violent act. There are various conflicts and resolutions, but not this one.