Age: 14 A girl with hair that cannot be cut. Her hair has never been cut since birth, so it is extremely long, and also grows fast. When Kiri found his ancestor's scissors, he was able to cut it, and he cuts it every time it grows (every day, due to to the curse). She is a shy and quiet girl, who has never attented school due her hair. Her ancestor, who was the first Hair Queen, left two curses behind before she died, the curse of the Killing Goods, and the cursed hair; the latter being the one Iwai carries. It is revealed that whoever kills Iwai, will have his/her wish granted, no matter what it is - and their curse will be lifted as well.
He is Iwai's guardian as well as Houko and Yamane's superior, he is a member of an organization called "Gossip" that monitors authors who posses killings goods who participates in the "Murderer's Game." (Source: ANN)
Age: 15 years old Kiri's classmate, who loves occult and gore.
He is the student council president of Tokusa High School dept. He is Ruka's "Instead" who uses her killing good "The Pet Whip of Submissive Butchery" to make people, especially males, into submissive zombies that she can dominate. (Source: ANN)
A junior high student who is not very good at anything. He just found out that his grandfather was King of the Sorcerers and that sorcerers all over the world want to kill him so they can gain the great source of magic that he has inherited (Shonen Sunday).
She is an author whose killing good is a piano called "Pianissimo of Ecstatic Symphony" that kills people after listening to the final note, she is a talented pianist and runs an inconspicuous bar called "Velvet" around the street alleyways, where Iwai's father frequents. She is blind and relies on her "Instead" Houichi to help manage bar, tune her piano and depose of the garbage which includes victims. (Source: Otaku-streamers forum)
He is Hitomi's "Instead" who works in her bar and does everything including disposing the bodies, he was the only one whom was able to listen to Hitomi play the last note with her killing good and survive, was the fact that he is deaf, and it is hinted that the reason that he can respond to people normally was that he can read people's lips. (Source: Otaku-streamers forum)