Characters can interact by simply thinking about what they need. If a character needs a place to hide a precious magical object, they can enter the Room of Requirement and the room will provide a hidden vault. Or if they need a place to practice a difficult spell without being disturbed, the room will create a soundproof area with all the necessary tools.
One key feature could be the sense of claustrophobia. Stephen King is great at creating an atmosphere, and in a 'room' novel, the limited space can intensify the feelings of the characters and the readers. The characters might be trapped physically or metaphorically within the room, leading to a build - up of tension.
One key element is the relationship between the captives, especially the mother - son bond. Another is the sense of confinement and how they cope with it.
The key elements in 'the room science fiction' are often the unique features of the room itself. It could have strange portals or wormholes. Also, the technology used in the room is important. For example, it might have a self - sustaining power source or a teleportation device. And the people in the room, their relationships and goals, like if they are trying to escape the room which has some sort of dangerous experiment going on.
In Harry Potter fanfic, the 'room of desire' might be a fictional concept created by the fanfic writer. It could be a room within Hogwarts or some other magical place that is designed to fulfill the deepest desires of the characters. However, it's not a part of the original J.K. Rowling's Harry Potter series.
One possible fanfiction idea could be that Harry Potter squints as he enters a mysterious room filled with strange artifacts. Maybe it's a hidden chamber in Hogwarts that he stumbles upon, and the dim light makes him squint while he tries to figure out what each object is and what their significance might be.
In a fanfic, the Room of Requirement could be a place where Harry and Ginny go to practice their magic together. They could be working on new spells or defensive techniques. Ginny could show Harry some of the unique magic she learned from her family. And in the process, their relationship deepens as they rely on each other and learn from one another.
Harry's life would be significantly different. He could store his belongings more safely and privately. In the past, he had to worry about things getting lost or borrowed without his knowledge in the shared dorm. Now, he can keep his Invisibility Cloak, his Firebolt, and other precious items in his own room. He might also develop a stronger sense of self - reliance as he takes care of his own space. Moreover, having his own room could make him feel more special and important, which could boost his confidence in dealing with the challenges at Hogwarts, whether it's facing Voldemort or getting good grades in his classes.