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.
In fanfiction, Hermione and Minerva could have a wonderful friendship. Hermione's thirst for knowledge would mesh well with Minerva's vast wisdom. They might often be found in the library together, discussing ancient spells or the latest magical theories. Their friendship could also be a source of support during difficult times at Hogwarts, like when the school is under threat.
There are many alternatives. For example, you can write fanfiction about the adventures of Finn and Jake in new, uncharted lands. Or perhaps create a story about Princess Bubblegum's latest scientific discovery. Another option could be to focus on the relationship between Marceline and Princess Bubblegum and how they interact in different situations.
Minerva in Harry Potter fanfiction is often the same strong, intelligent, and strict character as in the original books. She is a Transfiguration teacher at Hogwarts.
Well, there's 'A Time - Traveling Bond' in the realm of 'harry x minerva time travel fanfiction'. In this one, the time travel is caused by a mysterious spell gone wrong. Harry and Minerva end up in a time long before Harry was born. They have to figure out how to get back while facing many challenges together. There are also some really cool interactions between them that show a different side of their characters.
In Adventure Time fanfiction, Samantha could be an original character created by the fanfic writer. She might be a new friend or ally to the main characters like Finn and Jake. Maybe she has her own backstory, like she's a traveler from a far - off land who has come to the Land of Ooo seeking adventure or knowledge.
In Adventure Time fanfiction, the amulet related to the Nightosphere could be a powerful and mysterious object. It might be used to either control the chaos of the Nightosphere or as a key to unlock some hidden secrets within it. For example, a character could find the amulet and, not fully understanding its power, accidentally release some dark forces from the Nightosphere.
Some specialized fanfiction search engines might also be useful. They allow you to filter by various criteria such as genre, character, or rating. Just input 'Adventure Time' and start exploring the available fanfictions.