Boogie-kun  

, ブギーくん

Anjus talking doll has a sarcastic personality and often belittles Karin, leading to punishment for him. Although there are other dolls in his room with distinct personalities, "Boogie-Kun" is Anju's favorite. Despite being a murderer trapped inside a doll, Boogie-Kun becomes agitated when separated from Anju for extended periods. In the third volume of the manga, one of Anjus classmates takes Boogie-kun away, resulting in severe consequences until Anju eventually retrieves him again.