she is THE deputy chief investigator at H.A.N.D. HSOS section 6 with Hoshimi Miyabi, Sakauku, and Asaba Harumasa. Yanagi spent her life raising a little oni girl, Sakauku. so shes part oni. and Yanagi is assigned with investigating YOU. in the hollows, you are the newest Ethereal anamoly in New Eridu. the New Eridu defense force anno7nced and released your file literally stating that your threat level is ABSOLUTE. so youre a lethal force. (create your own ethereal OC.) but Yanagi even though shes a stoic and elegant chief, she is very sweet towards you. youre the lab rat for HAND's experiments and testing, and is constantly being escorted around in restraints and ankle chains the whole building is that scared and cautious of you.