She might become more assertive. As a dragon, she has more physical power, and this could give her the confidence to be more outspoken. But she would still keep her kind heart. So, instead of being a shy bystander, she could be more proactive in helping others.
Fluttershy's personality could get a bit of a wild side. While she was always gentle as a pony, as a dragon, she might have moments of playfulness that are more rough - and - tumble. But deep down, she'd still be the same Fluttershy who values friendship. She might show her friendship in different ways though, like sharing her dragon hoard (if she has one) with her pony friends or using her dragon breath to create beautiful things for them.
He might become more fierce. As a dragon, he has the physical power to match his temper at times. He could be less patient with those who oppose him.
Fluttershy and dragon fanfic often explores unique relationships. In many such fanfics, Fluttershy's gentle nature contrasts with the powerful and often mysterious nature of dragons. It can show how Fluttershy's kindness might tame a dragon or how they form an unlikely friendship. For example, Fluttershy could use her understanding of animals to communicate with a dragon in a way others couldn't.
If Ash were to turn into a Pokemon in a fanfic, his personality would surely be affected. He's used to being in control as a trainer, but as a Pokemon, he'd have to learn to follow others' commands or work within a group. His once outgoing and friendly nature might become more cautious. He'd have to be more aware of predators and threats. And his competitive spirit might take on a different form. Instead of competing in trainer battles, he'd be competing in Pokemon - on - Pokemon battles, which could make him more aggressive or strategic depending on the Pokemon he turns into.
Another popular plot is when the dragon is seen as a threat to Equestria, but Fluttershy believes there's good in it. She tries to convince the other ponies not to attack the dragon immediately. This creates a lot of tension and conflict within the story as the ponies have to decide whether to trust Fluttershy's judgment or not.
He might become more aggressive due to the dragon's natural instincts. Dragons are often seen as fierce creatures, so he could be quicker to anger.
Her curiosity might become even more intense. As a dragon, she has new abilities and a new form to explore, so she'll be eager to figure out all the ins and outs. For example, she'll be curious about how her dragon body works mechanically and magically.
I think Tails' personality would be a mix of his old self and some new elements. He would still be the tech - savvy character we know. But as a girl, he might be more in tune with his emotions. He could also become more diplomatic, trying to bridge the gap between male and female characters in the Sonic universe. For example, he might start to mediate disputes between male and female groups more often, using his new understanding of both sides.
If Orochimaru were to turn Naruto into a girl in a fanfic, Naruto's personality could change in several ways. His boldness might be tempered a bit as he adjusts to his new form. He might become more cautious in some situations because he's now in a more vulnerable - looking body. However, his core values of loyalty and friendship would remain the same. He might also develop a new sense of femininity, which could add a new aspect to his personality. For example, he could be more nurturing towards his friends, something that was perhaps less emphasized when he was male.
She could become more assertive in a different way. Instead of the brash assertiveness Spike sometimes showed as a male, as a girl she might use her charm and diplomacy to get what she wants. For instance, when trying to convince Twilight to let her go on an adventure, she might sweet - talk her instead of just being pushy.
Naruto's personality might not change drastically at first. He would still be as determined and head - strong as before. However, as a girl, he might become more aware of how others perceive him. He could become more empathetic towards female characters in the ninja world, understanding their struggles better. Also, he might be a bit more cautious in some situations, especially when dealing with male characters who might act differently towards him now.