百井 縁

A ROMLES member. A stoic and hard-working person, capable of making difficult decisions and acting appropriately in urgent situations. Outside of these situations, she is not as tough as she tries to be. She appears younger than she actually is. As the chief tour guide and as a ROMLES member, she has her responsibilities, but these don't always match. Yukari applied to become the chief tour guide of SHEEPIII's underwater voyage. She is at the highest position of the submarine staff and may be referred to as the submarine captain, although there is no such exact position in the SHEEPIII, as it is managed by AI on autopilot. She has information, albeit limited, of the horrific dangers that SHEEPIII will face underwater. Yet little did she know, that impending nightmare could be stopped no more... Seven years ago, Yukari managed to survive SHEEP's tragic underwater mission with the primary objective of recovering COOS cases that were lost in Kurama Bay during the "Forth Day" incident. The protagonist's older sister, Katagiri Hitose, and Ryuuzan Haruki were also on that mission, although they were already infected with the Alice virus prior to it and became incapacitated shortly after. As a result of the developed syndrome, Haruki and Hitose fell into a long and deep sleep. Yukari attempted to treat the first one by administering oxygen but mistook it for ozone. This resulted in his death from ozone poisoning after the rescue. In the end, Yukari managed to lift the submerged submarine by manually detaching its ballast. Nevertheless, Yukari misunderstands the truth about the Alice virus. Additionally, she believes that Haruki is in a coma and Hitose has passed away. It has become a deep regret for her that she left her alone on the sea floor.