The Hogwarts professors could be great supporting characters. For example, Professor McGonagall could be the one who encourages Hermione to be brave and face Draco. And Professor Snape could have some connection to the dark magic that cursed Draco in the first place, so he might be involved in the plot in some way.
Narcissa Malfoy could play an interesting role. As Draco's mother, she could be torn between her family's reputation and wanting her son to be free from the curse. She might initially oppose Hermione but then grow to accept her. And Luna Lovegood could also be a supporting character. She could offer Hermione some unique insights or magical solutions to help Draco.
Well, Harry and Ron could be supporting characters. Harry might be worried about Hermione being with Draco and come to check on her, which could add some tension. Ron could be skeptical at first but later see the change in Draco.
One idea could be that Draco is cursed to be a beast and Hermione stumbles upon his enchanted lair while on a research mission. She initially fears him but then realizes there's more to him than his beastly exterior.
Well, Harry in the role of the Beast would be more territorial about Hogwarts, which he now sees as his own 'castle'. He would be hesitant to let Hermione in at first, but slowly open up as he realizes she's different. His scar could be part of his 'beastly' appearance, adding to his sense of being different. Hermione would fit the Beauty role by being the one who brings light into Harry's dark world. She would be patient with him, using her logical mind to try and understand his situation, and at the same time, she would be drawn to his inner strength that she can sense beneath his exterior.
A young artist from a neighboring kingdom could be introduced. He hears about the Beast's castle and is intrigued by the rumors of its beauty and mystery. When he arrives, he could befriend Belle and see the relationship between her and the Beast. His unique perspective as an artist could add a different dimension to the story, like he could paint pictures that somehow affect the curse.
Leon could be a wandering knight who stumbles upon the Beast's castle. He might be on a quest for something and gets involved in the story. Bella could be a village girl with a kind heart and a curious nature. She might have heard rumors about the Beast's castle and decides to explore, which is how she meets Leon and the Beast.
A talking raven could be a new character. The raven could be the Beast's only friend before Beauty arrives. It gives Beauty some insights about the Beast's past and helps her understand him better. Another new character could be a kind old wizard who lives on the outskirts of the forest near the Beast's castle. He knows the secret behind the curse and gives hints to Beauty on how to break it.
You could have a female Beast called Lyra. She was cursed for her ambition in a world dominated by men. The male Beauty, named Ethan, is a healer. He sees the pain in Lyra's eyes and tries to heal not just her physical form but also her broken spirit. Their interactions would form the core of the story.
Ron Weasley often makes an appearance. He might be suspicious of Draco's intentions towards Hermione and try to protect her. His loyalty to Hermione and his hot - tempered nature can add a lot of drama to the story.
In Hermione - centered Beauty and the Beast fanfiction, she may also have different relationships with the other characters. The Beast might be more intimidated by her at first because of her magical abilities. And the enchanted objects in the castle could be in awe of her intelligence. For instance, she could use her knowledge of potions to try and find a cure for the Beast's curse, while also forming unique bonds with the talking teapot or candlestick.
An interesting new character could be a half - human, half - fae being. This character could have been trapped in the castle long before Belle arrived. He has knowledge of ancient spells and magic that could potentially help in breaking the curse. Another character could be a friendly giant who lives in the mountains near the castle. He is feared by the local villagers but is actually a gentle soul. He might play a role in protecting the castle from outside threats or helping Belle in her journey to understand the Beast better.
Obviously, Draco Malfoy and Hermione Granger are the central characters. Draco, with his platinum - blond hair and snobbish attitude at the start, is a complex character. He has been brought up with certain beliefs that he later may question. Hermione, on the other hand, is the brains of the Golden Trio. She is brave, but also very logical. In the fanfiction, their interactions, whether it's arguments or moments of understanding, drive the story forward.