Gender: female
Age: 14
Birth Date: January 7
Birthplace: Miden
Family: Kiyoshi (older brother), Takeo (younger brother), Yasuo (youngest brother)
Hair: half black, half a very bright red. (her hair color determines how much human and Miden she has in her blood. Her father <Kiyoshi's> had a very bright red color of hair, while her mother had black)
Eyes: A pure blue
Marks: her identification tattoo on the back of her shoulder
Home: lives with Kiyoshi.
Most Prized Possession: A necklace Kiyoshi gave her for her birthday
Hobbies: painting
Occupation: looking after her two younger brothers and cooking
Fears: To be alone
Goals: To keep her family together
Positive Characteristics: optimistic
Negative Characteristics: let's her anger control her words
Personality: Hiyo is Kiyoshi's light-hearted, unpredictable sister, who's love for her brothers is in someway expressed.
History: Hiyo was the first child of Kiyoshi's step mother. She was kept to the house, due to the fact she had human blood and couldn't protect herself well against the rest of the Midens. When she left the house, Kiyoshi was always there, closely guarding her. She was the only one upset to see Miden be destroyed, since it was the only home she knew.