It could be argued that Loki is also a kind of protagonist in his own way. Even though he is on the receiving end of Thor's hammer, his actions leading up to that moment are likely what drive the story. His schemes and plots are what cause Thor to react, so in a sense, he is a central figure in the narrative as well.
Another perspective could be that Asgard itself is the protagonist. Thor hitting Loki with Mjolnir is an event that is important for the well - being of Asgard. The story could be about how this action affects the future of the realm, whether it brings stability or more chaos. So, depending on how you look at it, different characters or even the whole realm could be considered the protagonist.
In this fanfiction, perhaps Thor hits Loki with Mjolnir as a form of punishment for one of Loki's many tricks. Maybe Loki has double - crossed Thor in a plan to take over Asgard, and Thor's only option to stop him is to use his powerful hammer.
There's 'Thor's Redemption in Loki's Arms'. In this story, Thor realizes his true feelings for Loki after a series of events that nearly tear Asgard apart. It's a tale full of emotion and character development.
One popular author is [Author Name 1]. Their stories often focus on the complex relationship between Thor and Loki. They are great at writing emotional scenes that really bring out the depth of the characters.
I really like 'A Different Path for Loki'. In this fanfiction, Loki is given a chance to redeem himself in a unique way. It's full of interesting plot twists and great dialogue between Thor and Loki. The author does a wonderful job of exploring Loki's psyche and his relationship with Thor against the backdrop of the Asgardian world.
One consequence could be a shift in alliances. Without Loki leaving Jotunheim, the relationship between Asgard and Jotunheim would be far more complex. The Asgardians might view Loki as a traitor, which could lead to Thor being caught in the middle. He loves his brother but also has loyalty to his home. Loki, on Jotunheim, could start to build a new identity for himself. He might use his knowledge of Asgard to strengthen Jotunheim, making it a more formidable force in the Nine Realms. This could set off a chain of events that would change the entire power structure of the realms.
When Thor is mean to Loki in fanfiction, it can lead to a downward spiral in their relationship. Loki, feeling constantly attacked, may lash out in more extreme ways. Thor, on the other hand, may double down on his meanness, believing it's the only way to deal with Loki. This can create a cycle of animosity where any love or brotherly bond they had is overshadowed by anger and distrust. For example, Loki could start to form alliances with Thor's enemies out of spite, and Thor would see this as confirmation of Loki's untrustworthiness, making the relationship even worse.
Thor might initially go into denial. He can't believe that Loki is truly gone. He may hold Loki's body for a long time, as if waiting for him to come back to life. Then, he could become angry. Angry at the situation, at whoever or whatever caused Loki's death. Eventually, he may find solace in the memories of Loki. Remembering the good times they had together and using those memories to move forward.
If Loki survived in Infinity War fanfiction, it could have led to a very different outcome. He might have used his trickery to deceive Thanos in some way. Maybe he could have pretended to be on Thanos' side while actually working against him. This would have added an extra layer of intrigue to the story as the other characters would have been unsure of his true motives.
A potential plot might involve Harry being thrust into the Norse realm due to his heritage. There, he could face challenges from the other Norse deities who might not accept him as Thor and Loki's son. Meanwhile, back in the wizarding world, Voldemort could sense his newfound power and see him as an even greater threat. Harry would then have to navigate between two worlds, trying to gain acceptance in the Norse realm and also defeat Voldemort in his own world. He could also discover new magical abilities related to his Norse blood, such as the ability to communicate with certain Norse magical creatures or use runes in a more powerful way than regular wizards. And his relationship with his friends in Hogwarts would change as they try to understand his new identity.
Their relationship could have become stronger. After Loki's 'death' in the movie, Thor was devastated. If Loki survived, Thor would likely be more protective of him. They might start to trust each other more fully, putting aside their past differences.