The Ice King can be a key character too. Maybe he tries to kidnap Minerva for his own strange reasons, thinking she can be his new princess. Marceline the Vampire Queen could also be involved. She might be Minerva's ally or foe depending on the plot of the fanfiction. There are also other minor characters from the Adventure Time series that can play important roles in Minerva - related fanfictions.
One interesting story could be about Minerva's origin. Maybe she was a lost princess from another dimension and her adventures in the Adventure Time world were all about finding her way back home while making friends with Finn and Jake. Another could be a story where Minerva discovers a hidden power within herself and has to use it to save Ooo from a new, unknown threat.
One common theme is self - discovery. Through time travel, both Harry and Minerva often learn more about themselves. For example, Harry might see a different side of his own courage when facing the past. Another theme is the alteration of fate. They may try to change certain events in the past which then has consequences for the future. And of course, there's the relationship theme. Their relationship, which is rather complex in normal circumstances, can develop in new and unexpected ways during the time - traveling adventures.
I'm not familiar with a character named Bronwyn in Adventure Time. It could be a very minor character or a name that is not part of the mainstream Adventure Time canon.
Adventure Time is a fantasy adventure story set in the Land of Ooo. It follows the adventures of Finn the Human and his best friend Jake the Dog as they encounter various magical creatures and go on wild quests.
The story of Adventure Time is a fun and imaginative one. It follows Finn and Jake as they explore a post-apocalyptic world, make friends with unique characters, and face various challenges. There's a lot of humor, heart, and fantasy elements.
Adventure Time started as an animated show, not a comic. The TV series gained popularity before any comic adaptations were made. The animation was the initial form of the story's presentation to the audience.
The Adventure Time graphic novels often have really vivid and colorful art. For example, the characters are drawn in a way that makes them look just like they do in the show. The storylines are also full of creativity. They can take the characters on wild adventures that you might not see in the regular TV episodes.