Hone Onna is Ai's third companion, and she often takes the form of a sultry woman in a kimono with its obi tied in front. She dislikes being called "old lady". She becomes the red straw doll when necessary by tossing her red obi jime over her shoulder. Hone Onna and Ren investigate the people who make a contract and the ones they have a grudge against. She usually infiltrates human society in casual clothing to investigate cases, on these occasions she tends to use the pseudonym "Sone Anna". She has used throwing knives as weapons in the first season of the show, and has shown considerable skill with these weapons. Hone Onna also seems to have some skill as a contortionist, which allows her to squeeze into very small places.