Loki and Thanos are the central figures. However, characters from Loki's family such as Thor could also be significant. Thor might notice the changes in Loki and try to rescue him from Thanos' control. Additionally, characters like Heimdall, who has the ability to see across the realms, could be involved in detecting Loki's unusual behavior and Thanos' influence.
Well, one possible plot could be that Thanos uses his mind - controlling powers on Loki to make him steal powerful artifacts for his collection. Loki, being under Thanos' control, has to go against his own nature at times. For example, he might have to target Asgardian relics that he would otherwise protect.
In this fanfic, Thanos could be using Loki as a pawn in a much larger scheme. Loki, who is now controlled, might be used to start a war between different realms. However, Loki's own cunning nature and his relationships, like his complex relationship with Thor, could come into play. Thor might notice that something is off with Loki and try to break Thanos' control over him. This could lead to a series of events where Loki slowly regains his free will and turns against Thanos in the end.
Well, obviously Harry would be one of the main characters as the story seems to revolve around him being the son of a god and Loki. Loki himself would also be a significant character. He could be a complex figure, perhaps mentoring Harry in some ways while also having his own devious motives. And then there would likely be other gods and goddesses who interact with Harry, either as friends, foes, or relatives.
Obviously, the Avengers like Iron Man, Captain America, Thor etc. would be main characters. And Loki's children, whoever they are in the fanfiction's interpretation. Maybe there would be a new character created specifically for this story as well who becomes important in the interactions between the two groups.
The Avengers are a must - they are the heroes of the story. For Loki's side, his children who have their own distinct traits. If the story focuses on the more well - known children, then Fenrir, the giant wolf, would be a major character. He has great strength and could pose a real threat or an interesting ally. Also, Thor might have a special connection or conflict with him due to his relation to Loki.
Probably the other Avengers like Captain America. He could play a role in trying to save Tony or in the fight against Thanos that ultimately leads to Tony's death. Maybe Doctor Strange as well. Since he has knowledge of the future and the Infinity Stones, he might be involved in some way. He could either try to prevent Tony's death or his actions could inadvertently lead to it.
Perhaps the main antagonist could be Loki himself, at least in the beginning. Since he got involved with Thanos' legs in some improper way, Thanos might see him as the antagonist. But as the story progresses, they might find a common enemy. So, initially, Loki's actions and motives that revolve around the legs could make him the antagonist in Thanos' eyes.
Another possibility is that Loki teams up with other characters. He could form an alliance with the Avengers or some other powerful beings in the universe. Together, they could come up with a plan to stop Thanos. Loki could contribute his unique skills, like his ability to shapeshift and infiltrate Thanos' ranks, and then they could launch a coordinated attack.
Loki would likely lose his usual sense of self - determination. He's normally a character who has his own plans and motives, but under Thanos' control, he would be more like a puppet. His actions would be dictated by Thanos rather than his own desires.
Well, Hulk could be involved in a more physical sense of bullying. His uncontrollable rage might be directed at Loki in the fanfictions. Black Widow, with her skills in manipulation, could also play a part in making Loki's life difficult. Hawkeye, being a loyal member of the Avengers, might follow the group's lead and be part of the bullying, perhaps using his archery skills to intimidate Loki.