A private detective with an odd personality. Likes to smoke when she is not solving cases.

Spoiler

Ten years ago, she went by her real name Kyouko Mejiro and was a member of a literature club at the school Nico Hirata taught the night class of. She became Nazuna Nanakusa's first friend until her father was turned into a vampire, causing both parents to die and Kyouko to quit school and disappear.