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.
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.
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.
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.
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.
Harry Potter himself is often a main character. Since it's related to the Harry Potter universe, he's likely to be exploring the mysteries of the dimensional trunk.
Obviously, Harry Potter himself is often a main character. He's the one who usually owns the trunk in the first place, so he's at the center of the story exploring what's in it.
Even some of the professors could be involved. Professor Dumbledore, with his vast knowledge and wisdom, might have some connection to the magical trunk. He could be the one guiding the students in their exploration of it, or perhaps he has left some clues for them to discover. Professor McGonagall might also get involved if she senses that the students are in over their heads with the trunk's secrets and she needs to step in to protect them.
Harry Potter himself is often a main character. Since it's related to the Harry Potter universe, he's likely to be the one who discovers or uses the multi - compartment trunk. Hermione Granger might also be involved as she's always curious about magical objects and would be interested in exploring the trunk's compartments.
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.
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.