Seto's competitiveness might be toned down. As a child pegasus, he doesn't have the same resources or experience he had as a human. So he might be more collaborative, realizing that he needs the help of others to get through this strange situation. He could also be more emotional, as children are generally more in touch with their feelings, and this new form might bring out a more vulnerable side of him.
In this new form, Seto could become more impulsive. Since he's not used to being a child pegasus, he might act before thinking, especially when faced with new and exciting things. His pride, which was a big part of his personality before, might be less prominent. He may not feel the need to assert his dominance as much because he's in a state where he has to rely on others. Also, he might develop a sense of playfulness that he never had as an adult, enjoying simple things like flying around just for the fun of it.
His personality might become more innocent. Without the weight of his usual responsibilities and power, he could be more curious and open - minded. For example, he might be more willing to explore new things instead of being so focused on winning and power as he usually is.
The plot might involve Seto trying to find Pegasus in this new form. Since Pegasus has a connection to the magical world of Duel Monsters, Seto could believe that Pegasus has the key to changing him back. Along the way, he might have to participate in some sort of duels in his child pegasus form, which would be quite a challenge as he has to adapt to new rules or powers that come with this form.
His personality might become more curious, like a cat. He could be more easily distracted by shiny things or new scents. Also, he might become a bit more independent, as cats tend to be, but still hold onto his strong sense of justice and protectiveness for his friends.
Well, in his cat form, Pitch Black could become more territorial. He might hiss at other animals or people who come too close to his 'domain'. His once menacing presence could be translated into a more stealthy and watchful nature. He would still be cunning, but now he would use his cat - like abilities to his advantage, like sneaking up on things. And perhaps his patience would increase, as cats are known to wait for the perfect moment to pounce.
His core personality might not change much. He'd still be brave and protective. But he might be more in touch with his emotions, as society often allows women to be more openly emotional. He could also be more perceptive about the subtleties in relationships.
His core personality might stay the same. Naruto has always been determined and full of energy. So, even as a child, he would still be eager to prove himself. However, he might be a bit more naive again, like he was in his early days. He would still have that strong sense of justice but might not be as tactful as his older self.
In a 'Seto gets turned into a child fanfiction', the plot might revolve around Seto's own struggle to adapt to his new form. He's used to being in control and powerful, but as a child, he has limited abilities. He could try to communicate with others about what happened to him, but with his child - like speech and behavior, it becomes a challenge. His friends might have to protect him from those who would take advantage of his vulnerable state.
Maybe Mokuba would be a crucial character. As Seto's brother, he would be deeply concerned about his brother's transformation. He could be the one staying by Seto's side the most, trying to comfort him and also helping the others figure out how to reverse the spell. Another character could be Kaiba's business rival who might see this as an opportunity to take over KaibaCorp, adding some conflict to the story.
Bakugou's pride would likely be affected. As a girl, he might feel a bit more self - conscious about it. He could be more defensive when people question his abilities. At the same time, he might also learn to use his new form to his advantage in some situations, like when trying to deceive opponents in battle. His personality would be a mix of his old self and new adaptations due to the change.
His personality might become more reserved. As a sphinx, he'd be more of an observer, so he might think more before acting, which is different from his sometimes impulsive nature as a human. He could also become more patient, as sphinxes are known for their calm demeanor.
If turned into a kid, Deadpool's personality would lose some of its edge. He'd be more impulsive in a child - like way, not thinking about the consequences as much as he does as an adult. His love for chaos would remain, but it would be more like a child's playfulness. He might also be more vulnerable in a sense, showing emotions more openly like a kid does.