Well, clearly Peter Parker and Tony Stark are the main characters. Peter is the one who 'snaps' in this scenario, which means he has a significant character shift from his normal self. Tony, on the other hand, serves as a sort of contrast or the catalyst for Peter's snapping. Even though Peter is the one with the new behavior, Tony's presence and actions are likely to be integral to the story as they are what cause Peter to snap.
For the heroes, there would be intense grief. They've lost friends, family, and comrades. Iron Man might feel an overwhelming sense of guilt for not being able to stop Thanos, thinking about all the lives that could have been saved. Captain America would be in despair, seeing the world he fought for fall apart so suddenly.
In this fanfiction, it could be that Peter snaps after Tony makes a decision that Peter strongly disagrees with. Let's say Tony decides to sacrifice a certain group of people to save the majority in a moral dilemma. Peter, who has a stronger sense of justice for the individual, snaps and decides to go against Tony's plan. He then has to fight not only the external threat but also deal with the rift he has created within the team.
You can try fanfiction websites such as Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, and there's a good chance you'll find some tony fingers ziva fanfiction there.
Some tony fingers ziva fanfiction could be about their adventures outside of work. Maybe they go on a road trip together and encounter various challenges along the way. This could lead to some really interesting character moments, where they have to rely on each other and their relationship deepens as a result.
Well, without actually reading the specific 'anna snaps fanfiction', it could be about a character named Anna and some sort of snapping event. Maybe it's about Anna reaching a breaking point in a particular situation, like in a relationship, a job, or within a group of friends. It could also be that Anna snaps at someone in a moment of anger or frustration.
One characteristic is that they often feature Butter Snaps in unique and imaginative situations. For example, she might be in a world where the rules of physics don't apply. Another is that they usually have a strong focus on the character's growth and development. In many fanfictions, Butter Snaps learns important lessons about friendship or courage.
It could be about Goku having a moment of intense emotion or decision - a'snap' moment. Maybe it involves Goku reaching his limit and making a drastic choice in a fan - created story. For example, he might snap in a battle and unleash a new, never - seen - before power to defeat a powerful enemy.
In fanfiction, Izuku snapping at Shinsou could be due to various reasons. Maybe there's a misunderstanding between them, like a competition for a certain opportunity at school. Izuku, being under a lot of pressure, might lose his temper.
In 'kokichi snaps fanfiction', it may also be related to the overall theme of the original work where Kokichi is from. If it's from a game, perhaps the events in the game lead him to a point where he can no longer hold back his true self or emotions. The fanfiction could be a way for the author to expand on that moment and show how it impacts the surrounding characters and the story world.