There could be a fanfiction where Loki kidnaps a Midgardian (human) because he believes that person has some sort of power or knowledge that can help him in his plans against Thor or Odin. Maybe the human has an artifact that Loki wants to use to open a portal to a different realm.
In some fanfictions, Loki might kidnap another Asgardian warrior out of jealousy or to prove a point. He might feel overshadowed by their popularity or skills, so he kidnaps them to show that he can disrupt the normal order of things in Asgard.
One popular fanfiction could be 'The Unexpected Bond'. It delves into how Loki and Bruce, with their contrasting personalities, form an unlikely friendship. Their interactions are both humorous and touching as they navigate the challenges within the fanfiction's unique plot.
Another reason could be that Loki is simply bored and causing chaos is his way of having fun. Kidnapping Jane would surely stir up a lot of trouble, especially between Thor and himself. He could be looking to prove a point, that he can still disrupt things in Thor's life even after his previous defeats.
One popular 'Loki Saves Avengers' fanfiction might involve Loki using his trickery in a unique way to rescue the Avengers from a powerful enemy. For example, he could deceive an evil force into thinking the Avengers are in one location while secretly leading them to safety.
One great Loki and Natasha fanfiction could be 'The Unexpected Alliance'. In it, they are forced to work together on a mission in a parallel universe. Their initial distrust gradually turns into respect as they face various challenges. Another is 'Loki's Redemption with Natasha'. Here, Loki tries to make amends for his past actions and Natasha is the one who has to decide if she can trust him again.
There are fanfictions where Lucy discovers Loki's true past in more depth. For example, it could explore how Loki came to be in the Fairy Tail guild and his connection to the celestial world. Lucy, being interested in celestial magic, could help him come to terms with his past while they form a deeper bond. It could involve flashbacks and a lot of emotional moments between them.
Another plotline often involves how female Loki deals with the changes in her body and powers during pregnancy. Some fanfictions might explore how her mischievous nature is affected or if she discovers new abilities related to motherhood. It could also be about her struggle to protect her unborn child from the various threats in the Marvel universe.
One popular 'Avengers Loki Punishment' fanfiction might involve Loki being banished to a desolate realm as punishment. In this scenario, he has to face the harsh conditions alone and reflect on his misdeeds. This could be a way for the Avengers to teach him a lesson without actually harming him physically but still making him endure the consequences of his actions.
One interesting 'Avengers meet Loki' fanfiction could be where Loki is actually forced to team up with the Avengers against a greater threat. Maybe a new, powerful enemy emerges that Loki realizes he can't defeat alone, and he has to use his wits and the Avengers' strength. In this story, there could be a lot of humorous exchanges as the Avengers are initially very suspicious of Loki.
In some 'Avengers and baby Loki' fanfictions, baby Loki could form a special bond with one of the Avengers, like Thor. Thor might be extra protective of his younger self in a way and try to shield baby Loki from the more judgmental Avengers while also teaching him about their family's history.
There's also 'Love Beyond Realms'. This fanfiction delves deep into the magical aspects of their relationship. It shows how Loki's powers and Darcy's inquisitive nature complement each other. The author does an amazing job of creating a world where their love can flourish despite the odds.