Kiba's wife is a minor character in Genshi Shonen Ryu, she is a member of the Badger Tribe who lived with Kiba and their son, Kumao. She and her son were killed by the Tyranno, which prompted Kiba to endlessly hunt down the Tyranno.
Kiba and his wife lived happily in the Badger Tribe, raising their son together. For an unknown reason, Kiba was injured in a prior event, therefore rendering him bedridden while his wife looked after him. their son came to them with news of the tribe's successful hunt. Kiba became excited, though his wife told him to rest. Kiba told her that there was nothing to worry about and called for a grand feast.
During the feast, the Tyranno came and started slaughtering the entire tribe. After Kiba was injured during the chaos, Kumao refused to leave his father's side. His wife came to aid him, however Kiba told his wife to flee with their son, unfortunately they were spotted by the Tyranno and it mercilessly killed them. Ever since then, Kiba swore to hunt down the Tyranno to avenge his family.