You can develop their relationship further by adding more challenges. For instance, introduce a character who is jealous of their relationship and tries to drive them apart. This could test their love and loyalty to each other. They would then have to fight for their relationship, which would strengthen their bond in the end.
Show their relationship in different settings. Instead of just the castle, put them in a situation where they are traveling to a neighboring kingdom. On this journey, they have to rely on each other in new ways. They might face difficult situations like getting lost in a forest or dealing with unfriendly locals. Through these experiences, they discover new sides of each other. For example, Adam might find out that Belle is really good at bargaining when they need supplies, and Belle might see Adam's diplomatic skills when they meet with the leaders of the neighboring kingdom.
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.
One way is by having them face family opposition. Maybe their families have different political views or old feuds. Standing up for their relationship against all odds can strengthen their bond. They could also communicate through letters at first. This old - fashioned way of communication can be very romantic. As they exchange their thoughts and feelings in writing, they start to develop feelings for each other before they even meet in person.
They could start sharing more personal stories. For example, Ciel could open up about his past traumas to Soma, and Soma could share his dreams for his homeland. This would create a deeper emotional connection between them.
As time passes, they start to understand each other more. Adam might show Belle parts of the castle she hasn't seen before, and in the process, they share stories. Belle learns about Adam's past and the curse that befell him, which makes her feel sympathetic towards him. This deepens their bond.
Their relationship would likely become even deeper. Adam would be more protective of Belle, constantly worried about her and the baby's well - being. Belle, on the other hand, might become more reliant on Adam's support during her pregnancy.
One way to develop their relationship further is to introduce a conflict that they have to resolve as a team. Let's say there is a prophecy that only they can fulfill together. In the process of trying to understand and fulfill this prophecy, they would grow closer. They might start to see each other in a new light, not just as friends or allies, but as potential life partners.
The relationship can be developed by having them face difficult challenges together. For example, in a tough Pokémon battle where they are outnumbered. They have to rely on each other's skills and instincts to win.
Their relationship could be developed through shared challenges. For instance, if they are both tasked with protecting a valuable item from being stolen by a new villain on the Isle. Working together to keep it safe would make them rely on each other more and strengthen their bond.
They could go on adventures together outside of Auradon and the Isle. This would put them in new situations where they have to rely on each other more, deepening their bond.
By showing them relying on each other's strengths more. For instance, Percy's water - related powers could be used in unique ways to protect Annabeth from the hellish fires of Tartarus, while Annabeth's strategic mind could help them navigate the complex and ever - changing landscape.