Inuyasha could become more of a leader. As he grapples with his new form, he might inspire others who are also dealing with difficult changes. He would have to face his fears and insecurities head - on, which would make him grow as a character. This could lead to him being more confident in his abilities and more strategic in his battles against enemies.
His relationships with others would likely change and develop. For example, his bond with Kagome could deepen as she stands by him during this difficult transformation. He may also learn more about the demon world and his place in it, which could make him more empathetic towards other demons or more determined to protect his human friends from the darker aspects of the demon realm.
Inuyasha might develop more self - control. If he has new powers from becoming this 'demon', he would need to control his impulses to use them recklessly. His character could become more introspective as he tries to understand what has happened to him and how to reverse it if possible.
Inuyasha's character would lose some of his charm. As a full demon, he would no longer have the endearing qualities that came from his human half. His sense of humor might disappear. He would be more focused on survival of the fittest in the demon world. His loyalty to his friends would be tested as his new demon nature might not value the same things. His character would become more one - dimensional in a sense, as the complexity of his half - demon state is removed. Instead of having the internal struggle that made him interesting, he would just be a full - fledged demon with all the typical demon traits like aggression and a thirst for power.
He might also become more patient. Usually a bit hot - headed, but with Kagome pregnant, he'd have to learn to be more calm and understanding. For example, when Kagome has mood swings due to hormonal changes, Inuyasha would have to control his temper and be more supportive instead of getting frustrated.
A plotline could involve Inuyasha's new demon form having a special connection to an ancient and powerful magic. This magic could be both a threat and a solution. He has to figure out how to use it to his advantage without being consumed by it. Meanwhile, his relationship with Kagome might be strained as she tries to help him, but he is afraid of hurting her in his new state.
He might lose his connection with his human friends. As a full demon, his instincts could become more savage and he might not be able to control his power as well as he did when he was half - demon. His appearance would also change completely, perhaps becoming more fearsome and less recognizable to those who knew him before.
Their relationship could start off as a bit rocky. Inuyasha might be a bit impatient with Rin's naivete at first. But as they face challenges together, like fighting off demons or finding their way through a maze - like forest, they start to respect each other. Rin would look up to Inuyasha's strength, and Inuyasha would come to appreciate Rin's kind heart.
Sakura would likely develop by becoming more self - reliant. In the Inuyasha world, she doesn't have her usual ninja support system. So she has to rely on her own skills and instincts more. For example, she might become better at making quick decisions in combat situations without relying on others to back her up. Also, her view of the world would expand as she experiences a completely different culture and set of magic. She could become more open - minded and learn to adapt to new and strange situations faster.
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 non - adult fanfiction, their relationship often develops through mutual understanding. For instance, Inuyasha begins to understand Kagome's kindness and determination as they face various obstacles. He sees how she never gives up, whether it's in helping a village or finding a way to defeat a powerful enemy. This makes him respect and care for her more deeply.
Start by deciding her backstory. Maybe she was separated from her brothers at a young age and grew up in a different environment. This could influence her values and beliefs. Then, think about her relationships. Does she look up to one brother more than the other? How does she interact with other characters in the Inuyasha universe? Also, give her flaws. If she's too perfect, she won't be believable. Maybe she's a bit too trusting or has a short temper when it comes to protecting her family.
The relationship would likely become more intense. They would have to rely on each other more, and their bond would deepen as they are about to become parents. Inuyasha would probably become more protective of Kagome.