In Harry Potter fanfiction, how could the characters of Remus and Snape be developed in a threesome story without changing their core personalities?

They could start as friends. Romilda could offer to help Harry with his schoolwork, especially in areas she's good at. Since Harry is a kind person, he would accept the help. As they spend time together, they gradually realize they have feelings for each other. Harry's loyalty and Romilda's determination can still be there, just in the context of their relationship growth.

Bella could be introduced to the wizarding world through Harry. Harry, being the curious and helpful person he is, might take it upon himself to show Bella around Hogwarts if she were to somehow end up there. He could introduce her to his friends, and Bella, with her quiet and observant nature, would soak in all the new information. For example, she could be fascinated by the spells and potions, much like she was intrigued by the vampires in her own world.

One possible plotline could be that Remus and Snape are forced to work together on a special mission within Hogwarts. They initially clash due to their past differences, but as they face various challenges together, they start to respect each other more. Then, they both have a connection with a third character, perhaps a new teacher at Hogwarts. They form an unlikely alliance to protect this person from some dark forces that are emerging in the wizarding world. This new bond gradually develops into a deep friendship that has elements of a threesome relationship in terms of their shared experiences and mutual protection.

Well, their relationship could start with mutual respect for each other's skills. Shan Yu respects Mulan's military tactics and Mulan respects Shan Yu's leadership among his men. This respect could gradually turn into a grudging admiration. For example, Shan Yu might admire how Mulan overcame so many obstacles as a woman in a man's army, and Mulan could admire Shan Yu's determination.

For Snape, his usually cold and strict personality could be enhanced in his dominant role. He might be more demanding and less patient. Harry, as the sub, could develop a more submissive side to his usually brave and headstrong personality. He would learn to listen more and be less impulsive.

For Harry, you can explore his more mature side. Since he has experienced so much in the original series, in the fanfiction, he can be shown as more confident and less impulsive. He could also be more empathetic towards Severus, given Severus' difficult past. For Severus, his dry sense of humor and his deep - seated loyalty (even if it's hidden) can be further explored. Maybe show how his relationship with Harry changes his view of the world and makes him a bit more open.

Well, their relationship could be developed through their mutual obsession. Michael is obsessed with hunting Laurie, and Laurie is obsessed with stopping Michael. In the fanfiction, this could be explored more deeply. For example, Laurie could start to predict Michael's moves based on his past actions and her knowledge of him, which would make their encounters more intense.

Another way is through the exploration of their family connection. Vader already knows he is Leia's father, but in fanfiction, he could be conflicted about how to handle this knowledge. Leia, on the other hand, could start to suspect something about their relationship. This internal conflict for both of them could drive the development of their relationship. They would still be on opposite sides in terms of the Rebellion and the Empire, but their personal relationship would be evolving in a very interesting and character - consistent way.

For Hermione, her determination and thirst for knowledge can be used to drive her actions. She might be determined to make the best of the arranged situation with Snape for the sake of the baby. She could start researching old spells and potions to ensure a healthy pregnancy, and in the process, learn more about Snape's past and what makes him tick. Snape, on the other hand, his cold exterior can gradually melt. His love for potions and magic could be a way for him and Hermione to bond. For example, he could create special potions for Hermione during her pregnancy.

One possible plot could be that they are forced to work together on a difficult magical project. Snape, being the experienced one, has to teach Harry and Draco some advanced magic. As they spend time together, they gradually overcome their initial enmity and form a sort of bond based on mutual respect for each other's magical abilities.