At first, Kagome is likely to be angry. She's a strong - willed character, so being kidnapped goes against her nature. She would probably struggle and try to escape immediately, yelling at Koga about how wrong his actions are.
One common plot twist could be that Koga actually kidnapped Kagome to protect her from a greater threat. Maybe there's a powerful demon that's after Kagome, and Koga, despite his rough ways, believes he can keep her safe. Another twist might be that Kagome discovers she has some hidden power while in Koga's captivity that helps her either escape or gain an understanding of the demon world in a new way.
One possibility could be a story full of drama. Maybe Kagome initially struggles with the idea of having a child with Koga. She might worry about how her friends, especially Inuyasha, will react. But as time goes on, Koga shows his unwavering support and love for her. He vows to protect their family at all costs. And together, they start to build a new life, away from the chaos of their previous adventures, focusing on the future of their unborn child.
Another theme is adventure. Given that they are both part of a world full of demons and magic, fanfictions often send them on exciting quests together. For example, they might go on a journey to find a powerful artifact or to defeat a new evil that has emerged. This not only tests their relationship but also shows their individual strengths.
Another theme is the struggle for acceptance. Koga is a wolf demon and Kagome is a human with her own set of values. Their different backgrounds lead to a struggle where they have to accept each other's differences in these fanfictions. For example, in many stories, Koga has to adapt to Kagome's human emotions and she has to understand his demon nature.
Perhaps in the fanfiction, Koga kidnaps Kagome believing she has some special power that can help his wolf demon tribe. He might think that she can heal the sick among them or bring good fortune to their land. However, Kagome doesn't actually have this power, and she has to convince Koga to let her go while also trying not to anger him too much. As she's held captive, she might learn more about the wolf demons and their way of life, which could be an interesting aspect of the story.
One common theme is the love triangle aspect, with Inuyasha also in the picture. It often explores how Koga tries to win Kagome over despite Inuyasha's presence. Another theme could be adventure, as they are both part of the Inuyasha universe which is full of quests and battles.
Yes, there are many. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Search for the specific pairing 'Koga x Kagome' within the Inuyasha fandom section. Some fanfictions might focus on their relationship development, adventures they could have together, or how they interact in different scenarios.
One great 'Koga x Kagome' fanfiction might be those that focus on their unique relationship dynamic. For example, some stories could explore how Koga's wild nature and Kagome's kind heart interact. Maybe in a story where they are forced to team up against a common enemy, and through that, they start to understand each other on a deeper level.