Fuyumi Yanagi

Yanagi Fuyumi  (柳冬実)  is the human high-school-aged girl from Japan who becomes lost in the Demon World after traveling through the  mysterious Black Curtain. She becomes a ghost after being eaten by a carnivorous plant. The triangle headband she dawns is a symbol of this. After she becomes a ghost, Staz vows to bring her back to life.

Appearance
Fuyumi is a 16~18 year old girl, once human but now ghost. Her skin is pale, and she has blue-purple eyes. Her hair is about shoulder length and black, and she always dawns a triangle-shaped headband, which is a common symbol to denote the person is a ghost in Japanese culture. She is most often seen in her highschool's uniform.

Personality
Personality-wise, she is shown to be a kind, sensitive and supportive person, though she can also be somewhat naive and shy. She often finds herself astounded and sometimes annoyed by Staz's lack of common sense, yet she eventually has unquestionable faith in him. She wishes to be resurrected as a human, and to help Staz achieve that goal.

Plot
Fuyumi first stumbles into the demon world after being transported through a magical Black Curtain. However, it is still unknown how and why she is there, because it is  also hinted that she may play a pivotal role in Braz's plot to overthrow the current Demon King, Father Wolf.  After getting lost in the demon world, she is brought to the district ruler, Staz Charlie Blood, the main protagonist of the series.   Because she is from Japan,  Staz is even more interested in her, often asking about anime and manga from the human world. After Staz leaves to fight a challenger, she is eaten by a carnivourus plant, and turned into a ghost. When Staz learns of this, he vows to protect her and to bring her back to life. In order to do this however, He must meet many people and go through many challenges.

It is later revealed she is the sister of Hydra Bell, sister of Hydra Knell , and the daughter ofNyen.

Techniques
Franken theorizes that due to her nature as a ghost, she will become a very powerful hybrid because she has the ability to absorb and utilize multiple types of magic from other demons, though it requires her to have a source to 'feed' off of, such as Staz's blood. Because of this, he believes that Fuyumi is powerful enough to eventually even rival Staz.

Known Family
Sister: Bell Hydra

Brother: Knell Hydra

Mother: Nyen Hydra

Father: Yanagi (unknown first name)