Their relationship can be developed by showing Thor's gradual descent into yandere behavior. At first, it could start with small acts of overprotectiveness, like Thor always being by Loki's side during battles. Then, as time passes, it becomes more extreme. Loki, on the other hand, can initially be confused by Thor's actions, but then slowly realize the depth of Thor's obsession. This realization can lead to different reactions from Loki, either trying to escape or, in a more complex scenario, starting to have some strange, Stockholm - like feelings for Thor.
One plot idea could be Thor becoming overly possessive of Loki after Loki gets too much attention from other Asgardians. Thor starts to isolate Loki, thinking it's for his own good. Another could be in a situation where Loki is injured, and Thor's yandere side emerges as he refuses to let anyone but himself tend to Loki. A third idea is that Thor, in his yandere state, tries to make Loki dependent on him by controlling all aspects of Loki's life in the name of protecting him.
Well, there are quite a few Thor x Reader x Loki fanfictions that explore different themes. For instance, some focus on a love triangle situation where the reader has to choose between Thor's straightforward and noble love and Loki's more complex and mysterious affection. You can search for these fanfictions on platforms like Fanfiction.net as well. The key is to read the summaries carefully to find the ones that match your interests.
There's also 'Loki's True Place by Thor's Side'. In this fanfiction, the author explores the idea of Loki finding his true self through his connection with Thor. It has a lot of emotional moments as Loki struggles with his identity and Thor is there to support him, making for a very engaging read.
Perhaps Loki is forced to stay in Jotunheim. There could be a powerful spell or curse that binds him to the realm. This could lead to an interesting plot where Thor has to find a way to break the spell and rescue Loki. It would also give Loki a chance to explore his identity while being stuck there.
Well, it can be a way to bring more diversity to the fanfic world. It allows fans to explore different aspects of Loki's character that might not be explored in the official Marvel stories.
One common trope is the 'fish out of water' for the reader when they are suddenly in the world of Thor and Loki. Another is the 'forbidden love' aspect, especially if the reader is from Midgard and the relationship with either Thor or Loki goes against some Asgardian rules.
The theme of power and responsibility also pops up. With Thor being the more responsible and power - holding one, and Loki being the more mischievous and power - hungry at times, fanfictions play around with how they balance these aspects in their relationship. For instance, there are stories where Loki has to learn to handle power from Thor in order to protect Asgard.
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.
Well, Loki staying in Jotunheim could lead to a whole new story arc. He might end up ruling the Jotuns, using his wits and magic. This could potentially make him a more powerful adversary to Asgard. Thor, on the other hand, would be in a tough position. He'd probably be sent to Jotunheim on diplomatic missions or even in a war - like situation. Their relationship would be filled with more tension and misunderstanding, but at the same time, there could be an underlying longing for their old bond.