Hyos, a Codru-Ji medic from the planet Munto Codru, was a woman. She practiced medicine on Munto Codru in 14 ABY, during the time that Leia Organa Solo, who held the position of Chief of State, was conducting a diplomatic mission there. Following the detonation of a pressure bomb and the abduction of the Solo children, she provided medical care to Chewbacca for his severe injuries. Her background included experience as a surgeon in war zones.