It could be Hagrid. Hagrid is always looking out for Harry and giving him things. He might come across this special trunk during one of his travels in the Forbidden Forest or in some wizarding market and think it would be perfect for Harry.
In the learning trunk, there might be a magical map similar to the Marauder's Map but with more detailed information about the Hogwarts library. It could show hidden sections and the location of books related to specific spells or magical theories. There could also be a set of magical crystals that when held, can transport him into virtual scenarios to practice spells and combat skills in a safe environment.
Well, it could be that the trunk is a magical trunk with all sorts of hidden compartments and powers. Maybe it has a self - cleaning function, or it can transform into a small shelter when Harry is in danger. It could also be filled with rare magical items that help him in his adventures at Hogwarts.
The learning trunk might offer him a more personalized learning experience. For example, if he's struggling with a certain spell, the trunk could provide a step - by - step guide or even a magical tutor in the form of a spell - casted projection. Also, it could give him the opportunity to study at his own pace without the distractions of a classroom. He can focus on the areas he's most interested in or needs to improve on, like advanced transfiguration or advanced defense against the dark arts.
Well, perhaps the plot could be that Harry is on the run from some dark forces and the trunk becomes his only safe haven. He might have enchanted it to be much larger on the inside, like the Room of Requirement. Inside, he could have all his essentials, his school books, his owl, and a little bed. He uses magic to keep it hidden and moves from place to place without being detected.
It could be that the manor trunk is enchanted in a special way. In the fanfiction, it might serve as a portal to another dimension or a time - locked chamber. Harry could accidentally open it and find himself in a different era of the wizarding world, having to figure out how to get back while also dealing with the unique challenges and characters of that time.
There could also be some original characters created for the fanfiction. For instance, an old caretaker of the manor who knows some secrets about the trunk. Or perhaps a long - lost relative of the Potter family who shows up because of something related to the trunk. These new characters could add new dynamics and plot twists to the story.
Harry is the central figure for sure. Neville Longbottom could play a role. He might be one of the few who know where Harry is hiding and is trying to protect the trunk from being discovered. Hagrid could also be involved. He might bring Harry some food and supplies while he's in the trunk. And there could be some mysterious old wizard or witch who has some connection to the trunk and its magic.
Well, Harry Potter and his mom are the principal characters in this 'harry potter and mom live trunk fanfiction'. Harry, being the hero of the original series, and his mom, whose presence is now in this strange living situation in the trunk. There could also be some secondary characters that play a role, like the magical guardians of the trunk if there are any, or perhaps old friends of his mom who try to reach out to them while they are in the trunk.
It's likely that Harry Potter himself would be one of the main characters. Since it's related to the Harry Potter universe, he would probably be at the center of the story, exploring the multi - dimensional trunk. Hermione might also be there, using her intelligence to figure out how the trunk and the different dimensions work.
I'm not sure specifically as there could be many different takes in such a fanfiction. It might involve Harry and his mom having some sort of unique adventure while living in a trunk. Maybe they discover a hidden magical world within the trunk or use it as a refuge from the dark forces in the wizarding world.