One way to develop it further could be to describe what he was thinking during those blinks. For instance, 'Natsu blinked a couple of times, his mind racing with thoughts of how to counter the strange magic he just witnessed.'
In fanfiction, 'natsu blinked a couple of times' could be used to show his momentary surprise or confusion. It's a simple action that can convey a lot about his state of mind at that moment.
They could have more deep conversations about their future as a family. For example, discussing how they want to raise their children, what kind of values they want to instill. Also, showing them supporting each other in small daily things, like Lucy helping Natsu with his reading skills and Natsu helping Lucy when she has a tough day at the guild. This would strengthen their bond on a more personal level.
Minerva could be developed by showing her more vulnerable side. In the original series, she is often seen as strong and intimidating. But in fanfiction, she could open up to Natsu about her fears and insecurities. For example, her fear of not being good enough despite her power. This would make her more relatable and humanize her character.
Another way is to give him new powers or abilities that he has to learn to control. This could lead to him facing challenges and making mistakes, which in turn would help him become a more well - rounded character. He might also have to teach the present - day Natsu about these new powers, creating an interesting dynamic between his past and future selves.
To develop Natsu further, we could explore his godly side more. Maybe he starts to have visions or dreams related to his godly powers. This could make him more introspective and less impulsive at times. He could also start to learn new forms of magic that are related to his godly heritage.
Their relationship can be developed by having them share more personal stories about their past with the dragons. For example, Natsu could tell Wendy about Igneel's funny habits, and Wendy could share her memories of Grandeeney. This would strengthen their bond as siblings who share a common dragon - slayer heritage.
For Bart, you could explore his softer side more. Show how he really cares about his family deep down, even if he acts out. For Lisa, perhaps show her struggling with non - academic things like making friends outside of her usual intellectual circle.
You could also develop their characters through their relationships with other characters in the fanfiction. If they have friends or foes, how they interact with them can reveal more about who they are. For example, if they have an enemy, do they fight back bravely or try to find a peaceful solution? This can tell us a lot about Reiji and Xiaomu.
Victoria's character can be developed by making her more assertive. In the context of fanfiction with Agent 47, she could start to take on more dangerous tasks and prove herself. For example, instead of always relying on Agent 47 for protection, she could save him in a crucial moment, which would show her growth and independence.
To develop their partnership further, they could be involved in a rescue mission together. For instance, saving some important characters who are trapped in a dangerous place. During this mission, they would have to rely on each other's strengths. Naruto's combat skills and Katsuyu's ability to split and cover large areas would be crucial. They would learn to trust each other even more and find new ways to work as a team.