During his twelfth birthday, he meets a charming boy named Nezumi having escaped from a correctional home. Shion protects him, but it disappears the next day without a trace. Zion is deprived of much of its privileges for complicity leak is found and deported to "Lost Town".
Four years later, he witnessed an incident in which he is stung by a bee parasite contracted an incurable disease that accelerates aging. This incident lead to the secret of No.6.
He lives in the wealthy neighborhood of the city, Cronos, with his mother, Karan. He felt feelings for Nezumi, who is extremely candid. Zion is the victim of a mysterious virus produced by bees that hit No. 6.Il parasites survives, but with sequelae: his hair turned white and a red mark in the shape of snake curls around her body.
He is a mysterious boy who sneaks into the house of Shion to escape the Ministry of Public Security. At first suspicious of Shion, but later we know that caused a great change in him, realizing that there is human kindness. No.6 despises and seeks to destroy all costs. His stage name is Eve.
DogKeeper / Inukashi
She was raised by a dog. She or he praises his dog has its clients to help them warm at night.
She is a childhood friend of Shion. In the book, she is in love with Shion.
He is a journalist who formerly published journals on the outdoor life, but one day when he wanted to go home at No. 6, he realizes he can not because the security services blocked the Input the city.