Another theme is self - discovery. The OC, who is often an outsider or someone with a unique background, also goes through a journey of self - discovery while interacting with Loki. They both learn about themselves and their capabilities through their relationship.
There's this 'Loki x OC Fanfiction' called 'Love in the Shadows'. The OC in this story is a thief with a heart of gold. She accidentally steals from Loki and that's how their story begins. It's full of witty banter between them. The author has created a really unique OC who is not intimidated by Loki's power and status, which makes for a very engaging read.
The OC might be terrified at first. After all, being kidnapped by Loki is no joke. But they could also quickly gather their courage. Maybe they would try to talk to Loki, to understand his motives. If the OC is smart, they would know that Loki has his own reasons for doing things and might be able to find a way to reason with him.
A common theme is the struggle against fate. Since they are soulmates, there's often some kind of pre - ordained connection, but the characters, especially Loki, may resist it at first. For example, in many stories, Loki is hesitant to accept the OC as his soulmate due to his own trust issues.
One common theme is the discovery of love. Usually, the OC and Loki start off in a somewhat unexpected way, like in a situation where they initially clash but then gradually fall in love. For example, they might meet during a battle or a political intrigue in Asgard.
I really like the fanfic 'Loki's True Soulmate'. In this story, the OC is not your typical damsel in distress. She has her own powers and personality, which makes the relationship with Loki more interesting. Their interactions are filled with banter and a growing sense of connection. There's also 'Soulmate's Discovery' where the journey of Loki and the OC towards realizing they are soulmates is full of twists and turns.
One common theme is the power of love to change Loki. In many of these fanfictions, the OC's love helps Loki to become a better version of himself, or at least to see things from a different perspective.
One common theme is the unexpected nature of the pregnancy. It often creates a lot of drama and tension in the story. Another theme could be Loki's reaction to the situation. Some stories might show him being protective, while others could depict him as initially confused or even resistant.
Well, it really depends on your definition of 'good'. There are many fanfiction platforms where you might find Loki OC (Original Character) fanfictions, but 'lemon' often implies mature or sexual content which might not be allowed on all platforms. Some popular fanfiction sites like Archive of Our Own (AO3) could be a place to start looking, but make sure to abide by their rules and regulations.