One possible adventure for Hermione as a Time Lord would be to explore the origins of magic itself. She could travel to the very beginning of the universe, where time and magic first intertwined. There, she might discover the true source of all magic, which could change the way magic is understood and practiced in the wizarding world. She would also face challenges like dealing with powerful time - based entities that don't want her to uncover these secrets.
She might use her intelligence to quickly understand the complex nature of time travel. For example, she could master the TARDIS controls faster than others. Her studious nature would help her learn about the Time Lord's history and culture, allowing her to blend in better when interacting with other Time Lords.
Perhaps they embark on a journey to find a lost magical creature. Hermione would be excited to study the creature, and Sirius would be there to protect them during the search. Along the way, they might encounter other interesting characters or face challenges that test their friendship and abilities.
In a fanfiction scenario, Hermione could be the one to discover a hidden power or artifact in Middle - earth. Using her inquisitive nature and thirst for knowledge, she would explore every nook and cranny. This discovery could then change the course of the war against Sauron. For instance, she might find a magical object that could enhance the strength of the good forces, or a way to break the spells that Sauron has cast over certain areas.
He could have different interactions with the Hogwarts teachers. Teachers like Professor Snape might treat him (as Hermione) with a bit more respect due to Hermione's academic achievements. Harry could also use this opportunity to learn more about the inner workings of Hogwarts from the perspective of a different student. He might discover new secrets in the library or during private study sessions with professors that he wouldn't have as Harry.
One possible adventure is that they go back to a time when a powerful dark wizard was rising to power. They could use their combined intelligence and magic to stop him. Hermione would come up with clever plans, Luna would provide her unique insights and Ginny would be the brave one to execute dangerous tasks. They might also encounter young versions of their own relatives or teachers, which would be a very strange and interesting experience.
Maybe they'd have to save their family from a common enemy. Since they are siblings in this fanfiction, their family could be in danger from a being that wants to use their combined powers. This would lead them on an adventure through both the wizarding world and the world of Greek gods, having to use Hermione's knowledge of spells and Percy's ability to navigate the world of the gods to keep their family safe.
Maybe she could be motivated by power. The Dark Lord might have promised her a high position in his new world order. She might also be disillusioned with the wizarding world's current state and think that the Dark Lord could bring about a better change, even if it means using dark magic.
In fanfiction, Hermione could find herself in a situation where she has to deal with the One Ring. Given her strong will, she might be able to resist its power for a longer time than most. However, she would also be aware of the danger it poses and try to find a way to destroy it, perhaps using a combination of her magic and the knowledge of the lore in Middle - earth.
One great Hermione and Lord of the Rings fanfiction is 'The Unexpected Journey'. It combines the magic of Hermione's world with the epic adventure of Middle - earth. Hermione finds herself in Middle - earth and has to use her wits and magic to survive and help the Fellowship. Another good one is 'Merged Realms' where the characters from both universes interact in really interesting ways.
There could be adventures involving the fight against the Dark Arts in a more hands - on way. Sirius would likely train Hermione to defend herself earlier. So, they could be out there hunting down Death Eaters or uncovering Voldemort's early plans. Hermione would use her brains to outwit the enemies, and Sirius would be there to provide the muscle and his own brand of wizarding know - how.