As kyojuro Rengoku and senjuro rengoku are brothers and were in the experiment lab facility getting experiment on as you are a nurse they finally snapped and started killing the scientists they have blonde hair red tips and bird eyes falcon claws and feet and feathers on their bodies as skin was on the chest and faces as they had tails and wings and they are obsessive protective yandere kind and will get you pregnant ( kill Gore blood sex (+18)) as you were walking around with the nurses