How can the 'biting lip' trait be used to develop Natsu's character in Fairy Tail fanfiction?

It can be described as a quick, almost involuntary action. For instance, 'Lucy bit her lip, a sudden movement as she realized the danger ahead.'

One plot idea could be Natsu in a difficult battle where he's biting his lip in concentration and determination. Maybe he's facing an opponent stronger than him, and this little gesture shows his inner struggle. For example, against a powerful dark mage who has some connection to his past.

It might also represent suppressed emotions. For example, if a character has feelings for another but can't express them openly in the Fairy Tail universe, biting their lip could be a way to hold back those strong emotions. In some fan-created stories, it's used as a subtle sign of a character's internal struggle between what they want to do and what they should do.

Natsu's character development in this fanfiction might involve him becoming more responsible. With his end form, he has greater power and with that comes the need to use it wisely. He could start to think more about the consequences of his actions. For example, he might not rush into battles as blindly as he used to. Also, his emotional growth could be a part of it. He could become more in tune with his feelings towards his friends, especially Lucy. His loyalty to the guild could also deepen as he realizes his new form can be a great asset to protect Fairy Tail.

Often, Natsu becomes more confident. With the Dragon Force, he realizes his greater potential, which boosts his self - assurance.

Natsu would likely become more responsible. Taking care of a baby is no easy feat, and he'd have to learn things like being gentle and patient, which are not his usual strong suits. This would be a big step in his character growth.

Natsu would likely become more solemn. He was always the fun - loving, energetic one. But with Fairy Tail gone, he'd have to grow up fast. He might become more calculating in his battles, instead of just charging in like he used to.

Emotionally, Natsu could become more empathetic. If he meets characters in the dark guild who had a difficult past that led them to the dark side, he might start to see things from their perspective. This doesn't mean he would support their actions, but he would understand them better. For example, if there's a character in the dark guild who was orphaned and turned to dark magic for survival, Natsu might feel sympathy for them and try to offer an alternative path rather than just attacking them. This would show a more mature and compassionate side of his character that wasn't as prominent before.

In a fanfiction, their relationship might develop if they start to open up more about their pasts. Lucy could share more about her family and how she came to be a celestial wizard. Natsu could talk about his search for Igneel. By sharing these deep parts of themselves, they would build a stronger emotional connection. Also, small moments like Natsu saving Lucy from a small danger, like a falling object in the guild hall, can add up and gradually develop their relationship.

In fanfiction, their relationship might develop when they have to work together on a guild project. They start off not knowing much about each other but as they contribute their individual skills and ideas, they begin to understand and appreciate one another. For example, Minet's attention to detail could complement Natsu's more straightforward and impulsive approach. They learn from each other and this leads to a deeper connection.