Inuyasha would likely be very angry at first. He's used to having Kagome's attention and affection, and seeing her fall for Kouga would feel like a betrayal. He might lash out at both Kagome and Kouga, and there could be some intense battles between him and Kouga.
Eventually, Inuyasha might come to accept it, albeit reluctantly. He might realize that Kagome's happiness is more important, especially if he sees that Kouga truly loves and respects Kagome. He could then step back and focus on his own journey, although there would still be some lingering sadness and jealousy.
Inuyasha would probably be very angry at first. He has always had a possessive streak when it comes to Kagome. He might see Koga as a rival and try to fight him. But as time goes on, he could start to realize that Kagome is happy with Koga and, though it would be difficult for him, he might eventually back off and respect her choice.
One possible scenario in this fanfiction could be that Kagome is initially hesitant about her feelings for Kouga. But as they spend more time together, perhaps on their journey through the feudal era, she starts to see his true nature. His loyalty and fierce protectiveness might draw her in. For example, when they face a common enemy, Kouga's determination to keep Kagome safe could be a turning point in their relationship.
Kagome would probably be shocked at first. Then she would start yelling at Inuyasha, demanding to know why he's doing this. She's not the type to just sit there and take it.
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.
Inuyasha's demon friends and family might be a bit skeptical at first. Some of the more traditional demons might think that a human like Kagome is not a suitable match for Inuyasha. However, over time, they would see how much they love each other and come to accept her. Kagome's family from the future would be worried about her staying in the past but also happy that she has found love. Her mother especially might be sad to see her go but also supportive knowing that Kagome has made her choice.
Well, in fanfiction, Kagome joining Kouga and falling in love can be a really interesting concept. Maybe it starts with a chance encounter that makes Kagome see Kouga in a new light. Like, he saves her from a dangerous situation and she realizes he's not just a brash wolf demon but someone with a kind heart.
Inuyasha is devastated when Kagome gets hurt. He blames himself, especially if he was supposed to be protecting her. He'll pick her up gently and try to find a safe place to tend to her wounds. He might also call for help from his friends like Miroku or Sango. He'll stay by her side until she recovers, constantly on guard against any further threats.
Inuyasha may become uncharacteristically gentle. He'll softly speak to Kagome, asking how she feels. His actions are driven by his deep - seated feelings for her. He might even share some of his own insecurities with her while she's sick, like how scared he is of losing her. He'll also be on high alert for any danger, ready to defend her at a moment's notice.
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.
Inuyasha would likely become more protective. He's always been protective of Kagome, but with her pregnant, it would be on a whole new level. He might not let her go on dangerous missions as easily. Kagome, on the other hand, would probably get frustrated with his over - protectiveness at times, but also appreciate his concern deep down.