|Japanese Voice||Aya Endo|
|English Voice||Dorothy Elias Fahn|
She is accidentally saved from committing suicide by Itsuko and Mayu. After deducing she was being controlled by a phantom, the two learn students have been going missing at the university she works at and that there are rumors of "demons". It all started when Yukino discovered and took back the university what was in fact a Phantom hand from Machida. Her father began experimenting and learned humans can become a hybrid of human and phantom by eating them and began to turn the students as well, with some willingly agreeing. He planted a larvae in Yukino to make her commit suicide when she walked in on him trying to force her mother to eat phantom and killed her when she refused. In the anime her character is different, she is often referred to as the "hottie from the crime lab" by Ranmaru's colleagues. Her mother died prior to the Machida incident, with her father becoming obsessed with his research soon after. Saya set her and Ranmaru up on a blind date that ended up in them finding out more about the phantoms. Later on, on a second date they were attacked by Yukino's father after he turned himself in a hybrid of human and phantom. Leaving her job awhile after, Yukino gives Ranmaru the info behind the murderer of her mother who caused the Machida incident.