Another possibility is that the baby is actually a reincarnation of someone from Inuyasha's past. This would bring up a lot of emotions for Inuyasha. He would be faced with the task of either helping the baby remember its past or protecting it from those who might want to use it for their own gain. And throughout all this, we would see Inuyasha grow as a character, learning more about compassion and responsibility.
Maybe the baby turns out to be a key to some powerful magic. Inuyasha then has to figure out how to use the baby's connection to this magic without putting the baby in danger. He would have to work with Kagome and the others to understand this mystery. This would lead to a lot of adventures as they travel around to find clues about the baby's true nature. It would also create some interesting character dynamics, like how Sango and Miroku would react to this situation.
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.
Well, Loki might initially be confused about what to do with the baby. He could try to find the baby's parents. Maybe he uses his magic to keep the baby safe and warm in the meantime.
In this fanfiction, perhaps Luffy might take on the role of a protector. He could be very confused at first, not knowing how to handle a baby. But then, his kind heart would lead him to try his best to keep the baby safe and find its family.
Well, Merlin might take the baby under his wing and protect it with his magic. Maybe he'd have to hide the baby from those who would use it for evil purposes.
Well, he could try to find the baby's family. Maybe he'll start by asking around in his town, using his detective skills. He might also get some help from his friends, like Scott. They could use their knowledge of the supernatural world to figure out if the baby has any special powers or if it's in danger from other supernatural beings.
Perhaps the baby has some unique powers. Percy finding the baby could be the start of a whole new adventure. He could take the baby on a journey to find out more about its parents. Along the way, they might encounter old enemies of Percy's or new threats. The baby could also form a special bond with Percy, and as it grows, it could become an important part of the demigod world. Percy would have to teach the baby about the world of gods and monsters, and how to survive in it.
The baby could turn out to have some sort of special chakra. Naruto, being curious and always wanting to help, tries to find out more about it. He might seek help from Kakashi or other experienced ninjas.
Perhaps Hinata will be really confused at first. She could ask her friends for help, like Naruto. Together, they would try to figure out where the baby came from and what to do with it. Since Hinata is kind - hearted, she'll surely do her best to keep the baby safe and comfortable.
Well, Naruto might try to protect the baby dragon from any harm. He could use his ninja skills to keep it safe from enemies who might want to capture it for its power or rarity.
Well, Naruto might take the baby wolf to his home in the village. He could raise it as his own, teaching it ninja skills when it grows up. Maybe the wolf would become his loyal companion, like how Akamaru is to Kiba.