イレーネ・ウルサイス

Irene is a student at Rewolf Black Institute and the older sister of Priscilla. She and her sister are from a war-torn country, and got saved by the student council president of Rewolf Black Institute, Dirk Eberwein, as an exchange for Irene becoming Gravisheath's owner. Irene is harsh, cynical, rude, and violent, which could be partially attributed to their harsh upbringing. As such, she irritates, and makes enemies easily out of, just about anyone around her. Priscilla seems to be the only one capable of telling her off, even capable of making her apologize to others for her misdeeds.

Irene wields the Ogre Lux Gravisheath, which enables her to control gravity within a set area and create gravity orbs at the cost of her blood.