Well, perhaps it's a situation where Hermione is bound by shackles in an alternate universe. In this universe, magic works differently, and the shackles are enchanted with a spell that suppresses her magic. She has to rely on her wits and non - magical skills to find a way to break free. It could also be a plot where she is bound as a form of unjust punishment in a corrupt magical society, and she becomes a symbol of resistance.
In some fanfiction, Hermione being bound by shackles might be part of a time - travel plot. She could be sent back in time and bound by ancient shackles with old magic. Her knowledge of modern magic might not be enough to break free immediately. So, she has to study the magic of that time period to find a solution. Also, it could be a scenario where she's bound as part of a magical experiment gone wrong, and she has to figure out how to reverse the effects while still bound.
Perhaps the prison is a place where they imprison those with too much knowledge. Hermione, being one of the brightest witches, is seen as a threat. The shackles are designed to limit her access to her own thoughts. As she endures this, she starts to have visions that guide her to a hidden key, both literally and figuratively, that will free her from the shackles and the prison.
One possible fanfiction could be 'Hermione's Ordeal in the Shackled Prison'. It might explore Hermione's struggle and her attempts to break free from the shackles, both literally and metaphorically, within the prison setting. It could involve her using her intelligence to outwit the prison guards or find a way to escape the unjust confinement.
Hermione might also develop a different perspective on power. When bound, she is in a powerless state. This could make her re - evaluate how power is used in the wizarding world, and she could become more empathetic towards those who are oppressed. In addition, she may become more creative in her problem - solving skills, as the usual magical solutions might not be available to her while bound.
Perhaps Draco is bound in shackles in prison because he tried to protect someone. The fanfiction could focus on his internal struggle, how he copes with the confinement and the loss of his freedom. He could also have flashbacks to his past life outside the prison, which contrast with his current harsh reality, and this could drive his determination to escape.
They could symbolize the limitations Draco has in his relationships. For instance, he might be in a situation where he is 'bound' by his pure - blood status in a relationship with someone of a different status. Shackles can also be seen as a physical manifestation of the emotional and mental chains that hold him back from truly being himself.
They are often described in a very vivid and tactile way. Writers might say things like 'the cold, heavy shackles bit into Draco's wrists'. This gives the reader a sense of the physical discomfort and the inescapable nature of the situation he is in.
One idea could be a story where the bound collar has a hidden magical power that only the wearer can unlock. For example, it might give the wearer the ability to communicate with magical creatures in a unique way.
Well, one could be a situation where she's bound to the wall as part of a magical experiment gone wrong. Maybe some spell backfired and she's stuck there until her friends figure out how to reverse it.
A third plot could be that their presence in Ravenclaw changes the overall perception of the house. Usually seen as more cerebral and less action - oriented, Harry and Hermione bring a sense of adventure. They might convince their Ravenclaw housemates to join them in more dangerous quests, like exploring the Forbidden Forest for a rare ingredient for a potion that could help in the fight against the Dark Arts.
One plot idea could be that Harry, Hermione and Susan team up to solve a new mystery at Hogwarts that the teachers are overlooking. For example, a series of strange disappearances of magical creatures from the Forbidden Forest. They use their combined skills in magic, Hermione's research abilities, Harry's courage and Susan's unique knowledge of certain spells to track down what's happening.