ソフィア＝ユースティ

The princess of the demons. On her first day on the school, she caused a commotion and her maid, Chiko, was attacking anyone that was "rude" to her for not respecting her as she should be. Iori intervened saying that Sofia was just being arrogant and using violence, then Sofia ordered Chico to attack Iori, but Kei intervened and protected Iori, causing Chiko to become afraid of him for his strength. Seeing Kei's strength, Sofia got interested on him and started fighting him. Sofia was very strong, but Kei's, after constantly evading and changing places to a deserted location, ended the fight dealing a blow that opened a fissure on the ground. Kei's strength made Sofia even more interested on him and decided she would own him and decided to "start as friends" while she plans how to make him fall for her.