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.
One idea could be Triton initially disapproving of Ariel's relationship with a human, but as the story unfolds, he realizes the depth of her love and starts to support her in a new, more understanding way. This could involve some emotional conversations between them and a change in Triton's character.
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.
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.
One possible scenario could be that Pikachu is exposed to a strange type of energy. This energy mutates its genetic structure, slowly transforming it into a human form. At first, Pikachu might be confused and scared, not understanding its new body. But as time passes, it starts to learn about human ways, like walking on two legs and using its hands to pick things up.
King Triton is authoritative. As a king, he makes the rules in Atlantica. He is also rather traditional, as seen in his view of the human world as something dangerous and off - limits to his daughter. However, he does love his family deeply, which is shown by his concern for Ariel's safety, even if it sometimes leads to conflict between them.
The human would probably be extremely confused at first. Suddenly having a different body, with four legs and a tail, and seeing the world from a much lower perspective would be disorienting.
One idea could be that Jack Frost turns into a human to experience the warmth of human emotions. He might find himself in a small town during winter. As a human, he discovers the joy of a hot drink on a cold day, something he never truly understood as a spirit. He could also fall in love with a local girl who is kind - hearted and loves the winter. This newfound love makes him question whether he wants to return to his former state or stay human forever.
Well, the plot could start with a young mechanic who is always around cars. One day, while working on a very special vintage car, there's a strange energy surge. The next thing he knows, he is the car. He experiences life from a different perspective. He can't speak in the traditional sense but tries to convey messages through his headlights and horn. He discovers he has new senses, like being able to detect mechanical problems in other cars just by being near them. He goes on a journey to find a way to turn back into a human while having many encounters with different people and cars along the way.
Maybe in the fanfiction, there's a scientific experiment gone wrong. A human scientist was trying to find a way to bridge the gap between humans and monsters. Sans, being a curious skeleton, volunteered to be a part of the experiment. However, instead of just creating a connection, the experiment transforms Sans into a human. As a human, he experiences new emotions more intensely, like hunger and fatigue, which he didn't really have as a skeleton. He then uses his new human form to try and convince other humans that monsters are not to be feared.