- Voiced by: Chiwa Saitō
- A former talented performer in a famous theatrical group whose family owns an antique shop. She was once lonely and cold-hearted, but after her father introduced Sovereignty to her, she gradually falls in love with her/him. She initially posed herself as Sovereignty when she first met Haruaki and his friends but was revealed to be the real Shiraho when they visited her house. It's not clear but she cares for Haruaki. She is deeply in love with Sovereignty.
Voiced by: Yuka Iguchi
- Her true name is Sovereignty-Perfection-Doll. An androgynous cursed doll who causes her target to fall in love with her/him. She/He possesses a killing mechanism called Killing Organ with blades hidden all over her body. The mechanism activates when it marks the end of love. After her/his curse was removed, she/he is hired as the superintendent's maid.
- At the end of the anime series, her curse had not yet been remove, thus, remain as a cursed doll. However, her curse will only cause her to hug someone without killing the person she hugs. This is because the deadly blades in her body had been removed by Fear Kubrick and Haruaki. She is cares for Haruaki ,she loves Shiraho deeply.