name: Cassidy Lain
sex: Female
ethnicity: N/A
relations: Father, Mother, Y. Brother (Tao)
Cassidy's parents have contracted the virus spreading rampantly through their dome. She enlists in the Metal Wing for quick money to continue treating them, having long used up the savings her Father had stashed away for emergency. In her absence, she leaves her younger brother Tao in charge of the house affairs.

name: Rio Santos
sex: Male
ethnicity: Hispanic
relations: Father, Mother, 5 Y. Siblings, 1 O. Sister [deceased]
Rio is a Metal Wing veteran, enlisted as a young teenager to help his family's financial situation. He is the (now) oldest child in his family, and therefore feels a distinct responsibility to ensure their well-being, although his closest younger sister, Kaika, may beg to differ.

name: Avalan Rowen
sex: Male
ethnicity: Caucasian
relations: Father, Mother, Cookie the Dog
Another Metal Wing who Cassidy and Rio happened upon at the beginning of their travels. At times, he can be a little considerably dense, due to the sheltered life he led at home, but the simplicity with which he views the world is also sometimes a good thing.

name: Io
sex: Male
ethnicity: Greek
relations: None
A human who found Cassidy, Rio, and Avalan. He has lived with the demons for an undifined period of time, and the exact reasons behind it are unknown. Despite the fact that he has offered to lead the three back to a dome, he remains largely a mystery.

name: Shashirou
sex: Male
ethnicity: Demon
relations: Older Twin (Bashira)
A member of the demon clan Io resides with. He also dislikes humans like most of his race, and resorts to violence more often than his sister, being less mature of the two. He shares a close relationship with Io, and is willing to overlook his prejudice to help him.