One plot idea could be that an ancient spell backfires on Inuyasha. Kagome has to take care of baby Inuyasha while also trying to find a way to reverse the spell. Maybe she has to search for a rare herb that only grows in a dangerous, demon - infested area.
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.
Sesshomaru would raise the baby with a combination of discipline and protection. He would protect the baby from any threats, using his powerful abilities. At the same time, he would discipline the baby when it made mistakes, teaching it the ways of the demon world. Inuyasha, on the other hand, would add a more carefree and emotional touch to the parenting, creating a balance in the baby's upbringing.
In fanfiction, the baby could be the key to unlocking some long - lost secrets in the Inuyasha universe. Since Sesshomaru and Inuyasha have such complex histories and lineages, the baby might hold the answers to ancient prophecies. It could also have a special bond with the Jewel of Four Souls, perhaps having a unique way of controlling or protecting it that neither of its parents had. And of course, there would be all kinds of emotional drama as the two brothers - turned - co - parents deal with their new relationship.
A lesser - known 'Inuyasha finds a baby' fanfiction is set in a different timeline. Inuyasha finds a baby that seems to be from the future. The baby's presence causes a stir in the feudal era as everyone tries to figure out where it came from and what its purpose is. This fanfic is full of mystery and adventure as Inuyasha and his friends try to solve the mystery of the baby.
Kagome is an obvious choice. She has a strong bond with Inuyasha already, and when he turns human, their relationship could take on new dimensions. She might have to be more protective of him, or they could have different kinds of interactions. Miroku is also interesting. His wisdom and his own goals could play a role in helping Inuyasha deal with being human. He could offer advice on how to handle the new situation, or he might have some knowledge about the cause of Inuyasha's transformation.
There is no such thing as Inuyasha becoming a woman in a novel because Inuyasha is a Japanese manga character and his image is usually depicted as a male. Although some novels and manga depicted Inuyasha as a female character, this was usually based on fictional plots or settings rather than his real gender.
One idea could be that in this fanfiction, Wolverine turns into a baby due to a powerful mutant's accidental spell. The X - Men then have to take care of him while also trying to find a way to reverse the transformation. They might discover new aspects of Wolverine's personality as a baby, like his unwavering determination is now shown through his attempts to crawl towards danger.
One plot idea could be that Inuyasha, as a girl, has to deal with different reactions from the other characters. For example, Miroku might be more hesitant to touch her inappropriately as he used to do sometimes with Inuyasha in his male form. Kagome could be both confused and intrigued, and they might have to re - evaluate their relationship. Another idea is that Inuyasha in female form has different powers or a different way of using her existing powers, which leads to new adventures and challenges in fighting demons.
One idea could be that a villain's new invention accidentally zaps Kim and turns her into a baby. Her sidekick Ron has to take care of her while also trying to find a way to reverse the effect. He might struggle with basic baby - care tasks like changing diapers and feeding her, all while keeping her safe from the villain who might want to take advantage of her weakened state.