Roen is the loyal servant and watchdog of Lord Maksis. He's strongly devoted to Maksis and intends on reviving him to his previous power by obtaining the Grimoire. As a dog, Roen is rather laid-back, often resting on the student council's couch. While rarely interacting with the student council, he and Shiki have extremely hostile interactions, to the point where Roen's repeatedly shown disdain towards Shiki by biting and growling at him without second thoughts. Even when in his human form, Roen often makes a point of avoiding Shiki, most likely intimidated by him. While in this form, he enjoys having Siania and Ritsuka pet him.