Aoi's less successful younger sister and one of Guren's subordinates under Shinoa. She and Mitsuba are not on good terms as Aoi gives her the cold shoulder. One example of this is in chapter 39. When she arrives at Nagoya Airport with Kureto, Aoi notices her younger sister but turns her head from her and does not say a word. Later when she talks to Shinya she claims the Sangu clan has no need for weakling and traitors like Mitsuba.
A black demon-wielder under Guren's command. He attempts to strike at Kureto from behind. Aoi blocks the attack but says he is strong.
Leader of the Moon Demon Company. Aoi went to high school with him.
Aoi is Kureto's assistant and is totally loyal to him. She follows his orders without question and agrees when Shinya calls her Kureto's pet. She has a crush on him however he is unaware of it.
She meets him while he is in prison and tells him to act like a Hiragi. He simply calls her Kureto's pet which she agrees with.
He is the head of the Hiragi family. He threatens to keep Aoi as a hostage if Kureto does not obey his orders.