His loyalty would still be a big part of his personality, but it could be expressed differently. Instead of just following Natsu around like he did as an Exceed, he might try to support Natsu in more strategic ways as a human, using his newfound human intelligence.
Happy could also become more introspective in human form. He would start to question things more deeply, like the nature of friendship and the differences between the Exceed world and the human world. This would lead to some interesting character growth throughout the fanfiction.
One idea could be that in their human forms, Happy and Carla are part of a detective agency in Magnolia. Happy is the enthusiastic junior detective while Carla is the more serious and observant one. They solve mysteries related to magic items that have gone missing, often running into other Fairy Tail members who unknowingly hold clues.
If Happy dies, Natsu's power might be affected. Happy has always been by Natsu's side, and his death could cause Natsu to lose some of his confidence. For example, Natsu might not be as reckless in battles without Happy's support. The story could then shift to Natsu trying to regain his former self while also seeking revenge on whoever caused Happy's death.
One idea could be that Happy, in human form, discovers a new magic power that only humans can possess. He then has to learn how to control it while also dealing with the strange human emotions that come with it.
Another focus could be on their powers. In human form, their magical abilities might manifest in new ways. Maybe they can combine their powers in a unique way that was not possible before. They could use these new powers to protect the human world from threats that are related to the magic world of Fairy Tail.
He might become more empathetic. As a dragon, he was all about power and domination. But as a human, he could start to feel the pain and joy of others, which would soften his once - harsh personality.
In his human form, Acnologia might be more complex. As a dragon, he's mainly seen as a destructive force. But as a human, he could have emotions like regret, love, or compassion. For example, he might feel remorse for the destruction he caused as a dragon.
In some fanfiction, a human who is an artist finds a fairy tail. The fairy in the tail has the power to bring art to life. The human and the fairy work together to create a beautiful, magical art gallery. They invite other humans and fairies to see their creations, spreading happiness and harmony between the two worlds.
Happy's simple - mindedness often leads to humorous situations. He might misunderstand a complex plan in the guild and go off on his own tangent, creating chaos. For example, if the guild is planning a surprise party for someone and Happy misinterprets the instructions, he could end up ruining the surprise in a really comical way.
Happy's character development in a Fairy Tail Happy the Dragon fanfic could be quite complex. At first, he might be scared or confused about his transformation. However, as the story progresses, he could learn to control his new powers. This gives him a sense of accomplishment. His relationships with other characters will also change. For instance, he may become a role model for some of the younger members of Fairy Tail. His growth as a character could also involve learning about the moral responsibilities that come with great power. He might face tough decisions where he has to choose between using his dragon powers for good or being tempted by the dark side of power. Through these experiences, he matures and becomes a more well - rounded character in the fanfic.
One of the funniest scenarios could be when Happy tries to 'help' Natsu cook but just ends up making a huge mess. He might accidentally add too much of an ingredient or knock over pots while flying around the kitchen in excitement.