Khun Aguero Agnis is a Regular who is one of Bam's best friends. Khun is introduced in the Webtoon as a levelheaded character. He is from the Khun family which is one of the 10 Great Families. He is one of the "defected sons" of Khun Edahn and because his older sister failed to become one of Jahad's Princesses, he was driven out of his family. After being expelled from the family, he stole goods from the Khun family's treasury and decided to climb the tower.

In the Webtoon, he teamed up with Bam and Rak and continued climbing the tower with them. Khun was given the Light Bearer role and displayed great talent in manipulating the lighthouses. He is a smart and cunning Regular that uses strategies while climbing the tower rather than brute force.