He might become more empathetic in his human form. Since humans have a wide range of emotions and experiences, Kurama could pick up on these and become more in tune with the feelings of others compared to when he was just a fox demon.
Kurama in human form could be more cautious. In the demon world, he may have been more bold because of his power, but as a human, he is more vulnerable. So he might think twice before taking actions and be more calculating.
Often in fanfictions, Kurama's human form and Naruto have a more complex relationship. They could argue at times, especially when Naruto wants to take risks that Kurama thinks are too dangerous. But at the same time, they also share some really tender moments. For instance, Kurama's human form might comfort Naruto when he's feeling down about his past or his struggles with the village. They would have a deep bond that goes beyond just being a jinchuriki and a tailed beast.
Well, in fanfiction, Kurama's human form could be a really imposing figure. He might have long red hair, just like his fox form's fur color, and bright, piercing eyes. Maybe he'd be tall and muscular, with a sort of wild, untamed look about him, still carrying that powerful presence that he has as a tailed beast.
He might become more empathetic. As a dragon, he was all about power and domination. But as a human, he could start to feel the pain and joy of others, which would soften his once - harsh personality.
He would probably be more impulsive as a human. Since he was always about speed as a car, he might have a hard time slowing down and thinking things through. For example, in making decisions about his racing career or personal relationships.
His loyalty would still be a big part of his personality, but it could be expressed differently. Instead of just following Natsu around like he did as an Exceed, he might try to support Natsu in more strategic ways as a human, using his newfound human intelligence.
Kurama would likely become more empathetic. As a trainer, he'd need to understand his Pokemon's feelings to train them effectively. For example, if he has a timid Squirtle, he'd have to be patient and gentle, which could soften his usually tough demon - like personality.
In female form, Naruto might become more sensitive to certain things. For example, she could be more aware of how she is perceived by others in the swimsuit. Her boldness might still be there but could be expressed in a different way, like being more sassy. However, her core values of loyalty and determination to protect the village would remain the same.
Naruto might become more solitary. With the great power of Kurama, he may feel that he is different from others and that they can't understand what he's going through. This could lead to him spending more time alone, training to master his new power. But eventually, he would realize that he still needs his friends and their support, and he would come back to his more social self.
In his human form, Acnologia might be more complex. As a dragon, he's mainly seen as a destructive force. But as a human, he could have emotions like regret, love, or compassion. For example, he might feel remorse for the destruction he caused as a dragon.
A lesser - known but really engaging fanfiction is 'Kurama: Human Form Unveiled'. It focuses on the mystery surrounding Kurama's human form and how it affects his interactions with other characters. The author does a great job of building up the tension and intrigue as the story progresses.