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.
One emotional moment could be Thor's reaction. He might be filled with grief, disbelief, and a sense of helplessness. His usually strong and mighty self is shattered as he holds Loki in his arms. Another moment could be Loki's final words, if there are any in the fanfiction. His words might be a confession of his true feelings towards Thor, perhaps regret for past actions or simply an expression of love for his brother. It could also be the moment when other characters, like the Asgardians, learn of Loki's death. They may have mixed feelings considering Loki's complex past, but still, his death would be a significant event that shakes the Asgardian community.
Another aspect could be Loki's relationship with the other characters. Without Thor, he would need to build new alliances. He could form an unexpected bond with Hulk, perhaps using Hulk's brute strength and his own cunning to create a unique duo. They could then set out on a mission to retrieve the Infinity Stones from Thanos, with Loki devising elaborate plans and Hulk providing the muscle.
Loki could gain the ability to harness Thor's lightning. Maybe in the moment of Thor's death, some of his power transfers to Loki. This would be a huge boost to Loki's combat abilities and could make him a more formidable opponent against the likes of Thanos.
I'm not very familiar with this specific fanfic. However, generally, a fanfic about Loki and Thor might explore their complex relationship in the context of the Marvel universe. If Loki is intersex in this fanfic, it could add an interesting layer to the character's identity and how they interact with Thor.
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.
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.
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.
These fanfictions typically show their relationship as something that has to be hidden from the rest of Asgard. It adds an element of secrecy and danger. The relationship is also often portrayed as a way for both characters to find solace in a world that doesn't always understand them. Loki's cunning and Thor's power are intertwined in a way that makes their connection unique and captivating.
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.