Explore their backstories and find points of connection. Maybe they both had a difficult upbringing in different ways that could make them empathize with each other on a deeper level. For example, Naraku's creation and Inuyasha's half - demon status could be related in some way that they come to realize.
Use dialogue effectively. Have them have deep conversations where they question each other's motives and gradually see that they might not be as different as they thought. Naraku could start to see Inuyasha's determination not as a threat but as something to admire, and Inuyasha could start to understand Naraku's complex and often misdirected desires.
You can start by giving them a common goal. For instance, if there's a threat to the world of feudal Japan that only they can stop together. This would force them to interact and gradually build some sort of understanding.
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.
Well, in this mpreg situation, Koga and Inuyasha's relationship could experience a major shift. Koga, who was once just a rival to Inuyasha in some ways, now has to be a partner. He has to learn to be gentle and patient, which is a big change for him. Inuyasha, being the one carrying the child, will be going through a lot of physical and emotional changes. Koga will need to be there for him. As Koga supports Inuyasha through morning sickness, mood swings, and other pregnancy - related issues, Inuyasha will start to trust Koga more. This new level of trust and the shared experience of the pregnancy will transform their relationship from a somewhat adversarial one to a loving and committed partnership.
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.
In some fanfictions, if Inuyasha is made more human - like, say he loses his demon powers temporarily, Kikyo might see him in a new light. She could start to trust him more easily as he doesn't have the unpredictable demon side. This new - found trust could be the start of a deeper emotional connection.
Their relationship could develop through acts of kindness. Maybe Naraku's daughter saves Inuyasha's son from a dangerous demon. This would make him see her in a new light. And she, on the other hand, might be attracted to his sense of justice and honor, which is very different from her father. As time goes on, they would start to communicate more deeply, sharing their hopes and fears, and slowly falling in love despite the odds.
You can make it unique by exploring different character aspects. For example, delving deeper into Naraku's past and how it could have made him different. Or showing a side of Inuyasha that we haven't seen much in the original, like his diplomatic skills when dealing with other demons.
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.
Another way is through character backstories. If the fanfiction delves into their pasts, perhaps they find out that they have some sort of connection from long ago. This connection can be explored and can bring them closer together. For instance, they might discover that their families were once allies, and this realization makes them see each other in a new light.
Inuyasha would also be worried about Kagome's safety. He knows how devious Naraku can be. He might call out to Kagome as he gets closer to Naraku's lair, hoping to hear her voice and know that she's still alive. His reaction would be a mix of anger, worry, and determination to rescue the woman he loves.
Their relationship could develop in a rather complex way. Sesshomaru, being the proud demon he is, initially sees raising Inuyasha as a chore. However, as he witnesses Inuyasha's growth and determination, he starts to see a bit of himself in Inuyasha. Inuyasha, on the other hand, realizes that Sesshomaru's strictness is actually helping him become stronger. Over time, they form a bond that is part brotherly, part mentor - mentee. For example, Sesshomaru might teach Inuyasha how to better use his sword, and Inuyasha would show Sesshomaru the value of having someone to care about. This mutual understanding deepens their relationship.