Their relationship can be developed through shared adventures. For instance, they could go on a journey to find a cure for a strange illness affecting the sea creatures. During this adventure, they rely on each other's strengths, Ariel's curiosity and Triton's wisdom, and this deepens their bond.
Dialogue is key. Have them have heart - to - heart conversations. Ariel could tell Triton about her real feelings towards the human world, not just her infatuation with a prince, but her appreciation for human culture. Triton could then open up about his own past experiences with humans, if any, and his fears regarding Ariel's connection to the human world. Through these honest exchanges, their relationship would grow.
They could have a heart - to - heart conversation about the loss of Ariel's mother. This shared grief could be a starting point for a more open and understanding relationship. Additionally, Triton could give Ariel a special task related to the protection of the ocean, something that shows his trust in her. This would not only make Ariel feel valued but also strengthen their bond as they work towards a common goal.
Communication is key. They can have heart - to - heart talks where Triton shares his experiences and Ariel listens. This can help Ariel understand her father better and vice versa.
A good way to develop their relationship is through mutual self - discovery. They could each have insecurities or secrets that the other helps them face. For instance, Percy might be struggling with his identity as a son of Poseidon and Triton could share his own experiences of growing up as a sea god's son, which would create a deeper connection between them.
By having them share common goals. For example, protecting the sea and its creatures. This would force them to interact and gradually understand each other better.
A different way to develop their relationship could be through a magical accident. Let's say a spell backfires and Ariel and Ursula's minds are swapped. They have to live in each other's shoes for a while. Ariel experiences Ursula's loneliness and the reasons behind her actions, while Ursula gets a taste of Ariel's kind and curious nature. This could lead to a more empathetic relationship between them.
A great way to develop their relationship further is to show them building a life together. They could start a project like building a lighthouse that has a special connection to both the land and the sea. It would be a symbol of their love and unity, and during the process of building it, they would face challenges, make compromises, and grow even more in love.
One idea could be that Ariel discovers a long - lost power within herself and King Triton has to help her control it. Maybe it's a power that could potentially save the underwater kingdom from a new and mysterious threat.
They are enemies. Ursula wants to undermine King Triton's rule over Atlantica.
They could start by sharing more of their cultures. Ariel could teach Eric about the different species in the ocean, and Eric could introduce Ariel to the ways of his land. This would deepen their understanding and love for each other.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfics, and you can search specifically for Ariel and Triton ones. Just use the search bar and type in their names.