Halfs are the results crossbreeding between Huma and Gajuma. Due to the taboo standing of interracial relationships in the story, Halfs are an extreme rarity, with nearly all of the members of the story's protagonists having never seen one prior to meeting Hilda Rhambling. Halfs bear a mostly Huma appearance, featuring Gajuma characteristics such as horns, animalistic ears, and tails, which Eugene Gallardo mentions that all Halfs have. Throughout the entirety of the story, only two Halfs, Hilda and Militsa, are seen, both of whom are referred to as miracles due to the fact that Halfs have extraordinarily difficult births and are highly prone to illness.