The 'ugly' could be a physical change that makes a character an outcast. This would force them to develop resilience and self - acceptance. For example, if a popular Fairy Tail character suddenly had an 'ugly' transformation, they would have to scramble to re - evaluate their self - worth.
Maybe the 'ugly' is a mental state brought on by a powerful dark magic. A Fairy Tail character is consumed by self - doubt and negative thoughts, which is their 'ugly' side. They scramble to overcome it by facing their fears and insecurities. In the process, they become stronger both in magic and in character, which is a crucial part of character development in the context of Fairy Tail fanfiction.
One way is through an 'ugly' curse that affects a character's personality. They become mean and unlikable. As the story progresses, they scramble to break free from this curse. Through this journey, they learn about the importance of kindness and how their actions affect others in the Fairy Tail world. It's a great way to show growth and redemption.