One aspect of 'Adventure Time Finn Alone Fanfiction' could be exploring Finn's character development in isolation. Finn is usually a very social character in the main series, so seeing him alone can show a different side of his personality, like his self - reliance and how he copes with solitude.
In some Adventure Time fanfictions, Finn might be betrayed by a character he trusted deeply, like Jake. For example, Jake could make a deal that goes against Finn's values in order to protect the Candy Kingdom, leaving Finn feeling betrayed as he sees it as a moral compromise. Another instance could be a new character in the fanfiction who befriends Finn only to steal his magic sword for their own gain.
Well, Finn's real story is that he's a hero in the Land of Ooo. He's constantly on the move, exploring different parts of the land. He was raised in a rather unique environment, which has made him brave and curious. Finn has this unwavering sense of justice. For example, he'll always stand up to bullies like the Lich. His relationship with Jake is a big part of his story too. They're like brothers, always having each other's backs in any dangerous situation that they encounter during their adventures.
One idea could be that Finn is kidnapped by an old enemy who wants to use him as a bargaining chip against Princess Bubblegum. Maybe they demand her to give up the Candy Kingdom in exchange for Finn's safe return.
One possible scenario in this fanfiction could be that Finn's transformation into a vampire brings out a whole new side of his personality. He might struggle with his newfound thirst for blood while still trying to uphold his heroic values. Maybe he teams up with Marceline, who is already a vampire, and she teaches him how to control his urges.
He might meet some of the more reclusive characters in Ooo that we don't usually see in the show. Maybe a hermit - like wizard who gives him some cryptic advice.
There's a fanfiction that focuses on Finn's journey to save a vampire - infested kingdom. In this story, Finn teams up with some unlikely allies, including a vampire who has a change of heart. It shows Finn's determination and his ability to see the good in everyone, even vampires. The fanfiction is really detailed in terms of world - building, creating a whole new vampire - related ecosystem within the Adventure Time universe.
One great 'Adventure Time PB and Finn Fanfiction' is 'The Unlikely Bond'. It beautifully explores the friendship between PB and Finn in a new adventure where they have to solve a mystery in the Candy Kingdom. The story is full of the charm and humor that the show is known for.
Finn's parents in Adventure Time fanfiction can have really interesting backstories. Maybe his mother was part of an ancient race that was hunted, and she hid Finn to protect him from the same fate. His father might have been a member of the human tribe that was scattered across the Land of Ooo. Fanfiction allows for different interpretations of how Finn came to be alone as a baby. It can be really exciting to read different authors' ideas on this.
One common theme is friendship. Finn is all about his friends in the show, and in fanfics, his relationships with Jake, Princess Bubblegum, and others are often explored further. Another theme is self - discovery. Finn is constantly growing and learning about himself, and fanfics often take this aspect and expand on it. For example, in some fanfics, he discovers new powers or abilities that make him question who he really is.