Age: 35 Gender: Male Birthday: February 14th Height: 182cm He is the lead teacher at Babyls and the homeroom teacher of the Misfit Class. Along with Dantalion Dali, the Chief of Faculty, he is the second-in-command at Babyls and is delegated full authority when the Chair-Demon is absent. It was later revealed that the Dantalion and Naberius families have served as teachers at Babyls for generations; specifically, the second son of the Naberius family inherits the role of the 'Watchdog of Babyls' to protect the school. His rank is 8 (Cheth), one of only two such ranks among the faculty, making him and Balam the school's strongest assets. He wields significant influence, handling major school affairs such as rank placement for freshmen and classroom assignments. He appears to be a renowned demon throughout the Netherworld, not just within the school. During home visits, all parents except Sullivan address him as 'Lord' Kalego, expressing deep respect and stating it is an honor for their children to be taught by him. He favors words containing the character for 'solemnity' or 'discipline' (such as solemn, quiet, or purge). Accordingly, he possesses immense pride, is extremely strict with both himself and others, and places great importance on regulations. While he seems to look down on the Misfit Class students, he is strict because they are indeed troublemakers who showed little remorse; nevertheless, he understands each student's traits in great detail. He has even authored books on education, which are noted for their exceptionally high quality. Overall, he is stern and relentless, but he takes great pride as an educator and readily responds to legitimate requests from students. His convictions and sense of responsibility as a teacher are absolute. When evaluating or guiding students, he sets aside personal feelings—even for Iruma, whom he dislikes—to maintain strict professionalism. However, he does occasionally indulge his personal feelings as long as they do not conflict with his educational principles. He is a tsundere.