Robin is often a central character. His intelligence and leadership skills are put to the test in a different way when he's de - aged. He has to rely on his wits even more as a younger version.
Typically, the core members of the Young Justice team like Robin, Superboy, and Miss Martian are often focused on. Robin, with his detective skills, might have a different approach as a deaged character. Superboy's powers could be affected in unexpected ways, and Miss Martian might struggle with her telepathic abilities in her deaged state.
In Young Justice love triangle fanfictions, common characters involved could be Robin (Dick Grayson), Artemis, and Wally West. Robin and Wally are best friends, and Artemis may find herself attracted to both of them in different ways. This creates a complex dynamic where jealousy and unspoken feelings start to play out.
Often, the other members of the Young Justice team are involved. Artemis is frequently included. She might be the one trying to rescue Wally or be involved in the events that led to his being trapped. Robin also shows up a lot. He could be using his detective skills to figure out how to free Wally.
The main characters are, of course, the Avengers. But don't forget about characters like Vision and Scarlet Witch who are also part of the superfamily in a way. In the de - aged scenario, they could bring unique elements. Vision with his android nature might have a different way of dealing with the de - aged Avengers, perhaps trying to understand human emotions in a new light as the Avengers are now in a more vulnerable, de - aged state. Scarlet Witch could use her powers in unexpected ways to help or hinder the situation depending on how the story unfolds.
Obviously, Robin would be the central character. He's the one who is misplaced. Then there would probably be the other members of the Young Justice team like Aqualad, Kid Flash, and Superboy. They would be searching for Robin or perhaps be unknowingly involved in the events that led to his misplacement.
You can start by looking on fanfiction platforms like Archive of Our Own (AO3). It has a vast collection of fanfics, and you can simply search for 'Young Justice Justice League deaged' in the search bar. Another option is Fanfiction.net, which also has a large number of fan - created stories. Some Tumblr blogs may also feature or recommend such fanfictions. Just search for relevant tags like #YoungJustice #JusticeLeague #deaged.
Damian Wayne is often a central character. As the Son of Batman, he brings his own set of skills, his complex personality, and his relationship with Batman into the fanfiction. Also, characters from Young Justice like Robin (Dick Grayson or Tim Drake), Superboy, and Miss Martian are commonly focused on. They interact with Damian in various ways, whether it's as friends, rivals, or teammates.
Superboy is often involved. His strength and somewhat volatile nature can make for interesting scenarios when he's under mind control. He could be made to use his powers against his friends, and it would be a struggle for the others to stop him without seriously harming him.
It varies a lot. Sometimes it's the core team members like Dick Grayson or Wally West. Other times, it could be less prominent characters getting more focus in the fanfic.
Well, there are quite a few tropes in Young Justice and Justice League deaged fanfiction. The 'fish out of water' trope is really common. Imagine Superman as a teenager again, not quite understanding modern technology or social norms. It creates a lot of humorous and interesting situations. Then there's the 'found family' trope. The deaged characters often form new bonds with the Young Justice team, as if they're starting anew. Also, the 'power - struggle' trope can be seen. With their powers still intact but their mentalities changed, there can be conflicts over who should lead or make decisions in a situation.