Allura and Lance's relationship would also shift. Allura might be more motherly towards baby Lance. She'd use her elegance and grace to take care of him, perhaps singing Altean lullabies. Coran would be the wise old caretaker, sharing his knowledge about the universe with baby Lance in a simple way. Pidge might see baby Lance as an interesting experiment at first, but would also grow to care for him deeply as she realizes he's still their friend Lance, just in a different form.
Shiro's relationship with baby Lance would be one of responsibility. He'd feel a strong obligation to keep Lance safe and find a way to reverse his condition. The team as a whole would bond over taking care of Lance. Their interactions would be filled with more tenderness and they'd have to work together in new ways. There could be some really heartwarming scenes where the characters show their love for baby Lance in different ways, strengthening their overall relationships.
In such a fanfiction, the team would probably be in chaos at first. They'd have to figure out how to take care of a baby Lance. Keith might be really confused but also feel a sense of protectiveness. Pidge would be curious about how this happened scientifically. Hunk would be the most nurturing, making sure baby Lance is fed and comfortable.
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.
His relationship with Gray might become more complicated. Gray might be more hesitant to pick fights with Natsu now that she's a girl. And with Lucy, they could become closer as girlfriends, sharing more secrets and having sleepovers. Natsu might also attract new male friends who are interested in her as a girl.
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'.
His relationships with male friends might become more complex. They could start seeing him in a different light, maybe with a new - found attraction or a sense of awkwardness. For instance, if he had a close male friend before, that friend might struggle with how to act around him now. With female characters, he could either form a sisterly bond or face some jealousy if they see him as a threat in terms of male attention. His enemies might also underestimate him, thinking that as a girl he is weaker, but he would prove them wrong.
His relationship with Luffy would become more of a big - brother - little - brother dynamic. Luffy would likely play with baby Zoro a lot. Sanji might be more nurturing towards baby Zoro, which is a big shift from their usual banter. Nami and Robin would probably dote on him more, and Usopp might try to come up with little games for baby Zoro.
With his mentor or teacher figure, the dynamic would shift. Instead of being the student who is learning, Robin as a kid might be more in need of basic life lessons. His friends who were used to his equal partnership would now have to be more patient and understanding. They might find his child - like innocence endearing but also frustrating at times. And his relationship with any rivals could become more complex as they might not know how to deal with a kid version of him.
His relationship with Sasuke would likely be very different. Sasuke might be more suspicious of Naruto at first, seeing him as an unknown entity. But as they learn more about Naruto's new situation, they could develop a deeper bond based on Naruto's unique perspective.
His relationship with Hermione would be really different. As a kid, he might be more open about his feelings for her in an innocent, child - like way. He could be constantly following her around, wanting to be involved in whatever she's doing, like when they were younger in the original story but even more so. With Harry, they would probably get into more silly adventures together, like building forts in the Gryffindor common room or trying to catch magical creatures in the castle grounds.
His relationship with Obi - Wan would have been much more positive. There would be no betrayal, and they could have continued to be master and apprentice, or perhaps even equals as they both grew in the Force. With the Jedi Order intact, they could have worked together on many important missions. Anakin would also have a different relationship with Yoda. He would be seen as a more stable and reliable Jedi, and Yoda might have given him more responsibilities within the Order.