Well, it could be about their journey in raising the baby. Maybe the baby has some special powers inherited from Inuyasha and Kagome. They might face challenges like protecting the baby from demons who want to use its power for evil.
They would raise the baby in a loving environment. Inuyasha, with his rough exterior but kind heart, would be a strict yet loving father. He'd pass on his knowledge of the demon world and survival skills. Kagome would bring in her modern - day values like education and respect for all living beings. They might live in a village in the feudal era, but also take trips to Kagome's modern world for things like medical care and to expose the baby to new technologies. Kagome would also make sure the baby understood its heritage, both human and demon, and how to use its powers for good.
There could also be a storyline where the baby has a special connection to the Shikon Jewel. Maybe the baby is born with a unique ability to sense the jewel's power or even has the power to purify it further. This could lead to many adventures as they try to keep the jewel safe from those who would misuse it.
Kikyo could also play a role, though it might be a bit complicated. She could be a sort of spectral guardian, watching over the baby from afar. Maybe she has some knowledge or power that could be beneficial to the baby's future. Or she could be a source of conflict if she still has some unresolved feelings towards Inuyasha.
One interesting plot point could be the baby's first encounter with other demons. Since Inuyasha is half - demon, the baby might be seen as a threat or a curiosity. Another point could be the baby's relationship with Kagome's family back in her time. How will they react to a half - demon baby?
In fanfiction, their baby might have the power of enhanced senses like Inuyasha, such as super - sharp hearing and smell. It could also inherit Kagome's spiritual powers, being able to sense and combat demons effectively. Maybe it could even have the power to travel between the feudal era and the modern world with ease, a combination of both parents' unique abilities.
One possible storyline could be that they face many challenges together. Their friends might initially be shocked but then support them. Kagome and Inuyasha could struggle to find a safe place to raise their baby, considering Inuyasha's half - demon status and the potential danger from other demons. They would also have to deal with Kagome's family in her own time, who might not understand the situation at first.
Some great Inuyasha and Kagome fanfictions include those that focus on their adventures after the end of the series. For example, 'A New Beginning' which shows them building their life together in the feudal era. It has really good character development and stays true to their personalities.
Fans may also show the baby with a powerful aura. Its appearance might be such that it gives off an otherworldly glow, signifying its special heritage. The baby could be dressed in traditional Japanese - inspired clothing that is a mix of the styles from Inuyasha's time and Kagome's modern - day influence.
The story could start with Kagome giving birth in a hidden place in the forest, away from prying eyes. Inuyasha is both excited and worried about being a father. As the baby grows, it shows an affinity for spiritual powers like Kagome and also has the strength of Inuyasha. They raise the baby in a world that is still not fully accepting of their relationship, but they are determined to give their child a happy life.