Big Mac could be developed further by exploring his past. For example, revealing some childhood memories that have shaped him into the pony he is today. As for Sugar Belle, she could be developed through her relationships with other ponies in Ponyville. Maybe she has a falling out with a friend and has to learn how to make amends, with Big Mac by her side for support.
For Big Mac, he could be developed by showing his more emotional side. Maybe he writes poetry for Sugar Belle in secret. For Sugar Belle, she could be shown taking on more leadership roles in the community, with Big Mac's support. This would show her growth and confidence.
Good character development. It should show how Big Mac and Sugar Belle grow as individuals and as a couple. For instance, Big Mac could become more confident in expressing his feelings.
It could be about their relationship. Maybe it shows how they met, fell in love, and overcame challenges together. For example, it might tell the story of Big Mac being shy at first but Sugar Belle breaking through his reserve.
Another theme could be the challenges they face as a couple in the Equestrian world. This might include dealing with family opinions or community expectations. There are also fanfictions that focus on their daily life together, like working on the farm or participating in local events. These stories give readers a more in - depth look at their relationship and how they interact in different situations.
One plot idea could be Big Mac and Sugar Belle planning their future together, like building a new home in Ponyville. Another could be them facing a challenge in their relationship, such as a misunderstanding caused by a miscommunication at a local event. Maybe they go on an adventure together outside of Ponyville and discover a new part of Equestria.
Mac could be developed by giving him more complex family issues. For example, his parents could be going through a rough patch in their marriage and he has to deal with the stress at home while still trying to be a good student. This would add depth to his character.
For Aden, he could be developed by showing his growth in dealing with his past traumas. Maybe he starts to open up more about his difficult childhood and how it has affected his relationships, especially with Belle. This would make him more empathetic.
To develop Belle's character further, she could be given more leadership roles. For example, in Storybrooke, she could lead a group to protect the town's library from those who want to destroy it for some evil purpose. This would show her strength and determination outside of her relationship with Rumplestiltskin. Another way is to explore her past traumas more deeply. Maybe she had a difficult childhood that made her so interested in books as an escape, and delving into this could add more layers to her character.
Some MLP fan groups on social media platforms can also be a good source. For example, on Facebook or Reddit groups dedicated to MLP. Members might post links to their fanfictions or recommend ones they've read. It's a great way to interact with other fans while looking for fanfiction about this couple.
In fanfiction, Belle's character could be further developed by having her struggle with her own insecurities. Maybe she feels that she's not enough to fully break the curse. Adam, on the other hand, could be developed by showing his internal conflict of wanting to be fully human again but also being afraid of losing the part of him that Belle fell in love with as the beast. Their relationship could grow as they help each other through these internal battles.
For Alaric, his character could be developed further by exploring his past traumas more deeply. Maybe he has some unresolved issues from his time as a vampire hunter that resurface when he's around Caroline. For Caroline, her character could grow by having her face more complex moral dilemmas. For example, if she has to choose between helping Alaric or following the rules of the vampire community. They could also develop their relationship by having them share more personal stories and secrets with each other.