His relationship with Chi - Chi would be very different. Instead of being her husband, he's now like a son to her. She would be super protective. And with Gohan, it would be more like they are brothers. Gohan would have to look out for his 'baby father'.
With Vegeta, it would be quite interesting. Vegeta might initially see baby Goku as a weakness, but then he could start to respect the power that even a baby Goku has. And his friends like Krillin would be more like caretakers. They would be constantly worried about Goku's safety and development in his baby form.
For Bulma, she would probably be more of a mother figure to baby Goku. She'd be using her intelligence to figure out how to take care of him and get him back to normal. His relationship with Master Roshi would also change. Roshi might see it as a chance to train Goku in a different way, starting from a very basic level since he's a baby now.
The team as a whole would become closer as they united to take care of Keith. His transformation into a baby would bring out different sides of each character. They'd have to rely on each other more, communicate better, and work together in new ways. For example, they'd need to share babysitting duties, which would lead to more interactions and a deeper understanding of each other.
Well, with Sasuke, their relationship would become more of a protective - protectee one. Sasuke, who usually has a rivalry with Naruto, would now feel responsible for protecting this baby Naruto. With Sakura, she would be more motherly towards him. She might be the one constantly fussing over him, making sure he's clean and fed.
His relationship with Naruto might change. Naruto could be more protective of Kakashi as a girl. He might see her in a different light, like an older sister figure. With Sasuke, there could be some initial awkwardness. Sasuke, who is used to Kakashi as a male, might not know how to interact with him as a girl at first. And with Sakura, they could form a closer bond as girls, sharing things that only females in the ninja world might understand.
Inuyasha's relationship with his enemies would also change. Some enemies might underestimate him in his baby form, not seeing him as a threat. However, some might see it as an opportunity to get rid of him once and for all. His friends would have to be extra vigilant in protecting him. And as Inuyasha grows up again in the story, his relationships with his friends would be different because of this experience. They would have a shared memory of taking care of him when he was at his most vulnerable, which could deepen their loyalty and friendship.
His relationship with Naruto would likely change. Naruto might be more protective of Neji as a girl, seeing her as more vulnerable. He could also be a bit more awkward around her at first. With Hinata, they might become closer as girls and share different kinds of secrets. And his former male rivals might either be overly competitive in a different way or start to develop feelings for him, which would create a very different dynamic.
Well, with Kakashi, he might be more cautious in how he trains Sasuke. As a girl, Kakashi might have to consider different aspects of training, like physical limitations that might come with the female form. His relationship with his clan members, if they were still around, could also be different. They might have different expectations of a female Sasuke. And when it comes to the other male ninja in the village, some might be attracted to him, which would create some awkward or interesting situations.
His relationship with Hermione would likely change. Hermione is used to the human Harry, but now she has to deal with a phoenix - form Harry. She would probably be very curious and start researching immediately about any historical cases of humans turning into phoenixes. Ron, on the other hand, might be a bit more hesitant at first. He's used to the regular Harry and this new form might seem a bit strange to him. But overall, his friends would be protective of him. They would want to make sure that he is safe in this new form and not exploited by those who might want to use his phoenix powers for their own gain.
As for Naruto, he would probably find it hilarious at first. But then he'd realize that Kiba is still his friend and needs help. Naruto might try to come up with some crazy plan to turn Kiba back, like using his shadow clones to search for a cure or something equally zany.
His relationship with his enemies would change significantly. Voldemort or his Death Eaters might not recognize Harry as a rabbit at first, which could give Harry an advantage in some ways. However, if they did find out, they might see it as an opportunity to either capture or harm him more easily. Among his friends in Gryffindor, they would all be very concerned. Neville, for example, might try to use his knowledge of Herbology to find a way to reverse the transformation. And Ginny would be especially protective, seeing Harry in such a vulnerable state as a rabbit.
His relationship with MJ would become very different. Instead of a romantic partner, she might become more of a protective caretaker. She would have to deal with a baby - like Peter, which could be both challenging and endearing.