Ariel
Haruna's teacher at Matellis, who has an affinity for Kyoto-made tofu and sends Haruna to get her some, due to her credit cards being overcharged. It is unknown what her true motives are, but she is very protective of her students and will kill anyone who harms them (even if they have committed a terrible crime). It is later revealed that she had planned to overthrow Lilia Lilith, the Queen of Villiers, a century before the events of the series, and appointed her mentor, Chris, as the leader of the coup. It ultimately failed, and Chris (along with a few others involved) took the fall, with Chris herself cursed into the form of a middle-aged man; however, Ariel herself apparently managed to escape punishment and has since reformed.
