Koon Aguero Agnis (쿤 아게로 아그니스, Koon Ahgehro Ageunis; or "Kun Agero Agnis" or "Khun Aguero Agnes") is a defected "son of Koon Eduan", and is often referred to as Mr. Koon. He was expelled from the family because his older sister failed to become one of Zahard's Princesses. He teamed up with Baam and Rak and passed multiple tests with them. He was assigned the Light Bearer position and showed clear talent in the field. He is a highly cunning Regular, who manipulates rules of tests to suit his needs. He has currently just departed the Hell Express and is on the 43rd Floor.