Another theme is redemption. Ice King, being a somewhat villainous character at times, often goes through a journey of redeeming himself in relation to Finn. This can involve him changing his ways and becoming a better friend.
A great 'ice king x finn fanfic' is 'Ice King's Redemption'. This story is about Ice King trying to make up for his past misdeeds towards Finn. It shows his growth as a character and how Finn gradually comes to understand and accept the Ice King in a new light.
One aspect to consider in Finn Mikaelson x OC fanfiction is the character development. Finn has a complex backstory in the 'The Originals' universe, and when paired with an original character (OC), new dynamics can be explored. For example, the OC could be a witch who helps Finn deal with his family's issues in a different way than we've seen in the show. The relationship between them might start as an alliance against a common enemy and gradually develop into something more romantic.
Well, the Finn Balor Demon King story involves his unique character transformation. Balor is a great wrestler on his own, but when he becomes the Demon King, it's like he unlocks another level of power. He first introduced this persona in NXT (WWE's developmental brand at the time). Fans were immediately drawn to it. The Demon King persona represents a more aggressive and fearless side of Balor. In his matches as the Demon King, he often dominates and shows off some really cool and unique moves that he doesn't always use in his normal form.
One great example could be a fanfiction where Finn and the Ice Prince have to team up to save Ooo from a new, powerful enemy. In this story, Finn's bravery and the Ice Prince's ice powers complement each other in unexpected ways. They start off as reluctant allies but gradually develop a mutual respect as they face various challenges together.
One common theme is friendship exploration. Since Finn and Bubblegum have a unique relationship in the show, fanfics often delve deeper into how their friendship could develop in different scenarios.
One great theme is their friendship adventures. Stories that focus on their new quests and how they support each other through different challenges are always interesting. Another theme could be how they grow together as characters over time.
One popular trope is the 'forbidden love' trope. Given Finn's family situation and the complex power dynamics in the Mikaelson family, a relationship with an OC might be seen as something that goes against the family's wishes or interests. Another is the 'fish out of water' trope, especially if the OC is from a completely different world or species compared to Finn. For example, if the OC is a human in a world of vampires.
Since I don't know the details of 'ice king a novel', it could center around the ice king's adventures. Maybe he has to defend his icy kingdom from invaders, or he could be on a quest to find a magical item that is crucial for his realm. There might also be elements of mystery, like secrets within his ice - covered castle.
The Ice King was once a normal human named Simon Petrikov. He found a magic crown. When he put it on, it gradually corrupted him over time, transforming him into the Ice King. The crown's magic messed with his mind and gave him ice powers, but also took away his sanity bit by bit.