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. (Source: Tower of God Wiki)

Reborn is the baby Home Tutor of Tsunayoshi Sawada, and whenever he greets someone, he says "Ciaossu," a casual male greeting that combines Ciao and Ossu. He wears a black fedora with an orange stripe running across the sides of the cone. He has black eyes and wears an all black suit with black boots and a purple dress shirt underneath. He is always seen with his pet chameleon Leon on the brim of his hat, along with his yellow Arcobaleno pacifier. Out of all Arcobalenos, Reborn is said to be the strongest.