well.. ive heard that inuyasha gives kagome the sacred jewel to become half demon , but i dont think that happens so i still have to say they will have dog ears but its eathier white hair o black its all up to genitcs!!
Well, since it will only be a quarter demon, it's not likely to look entirely like a demon. I usually imagine a girl with Kagome's black hair, but amber eyes like Inuyasha's, small claws, and either pointy ears o doggy ears. The picture below is sort of how I imagine her, except maybe with dog ears, and/or yellow eyes.
i would say that if inuyasha and Kagome would to have a child, the child then should be a human child, because inuyasha is half human and half demon, Kagome is a full human. Then their child should have the human DNA más than a demon, but the child might still have little amount of demon blood in them though <3